Document:

Lake Victoria Mining Company, Inc.: Exhibit 10.17 - Filed by newsfilecorp.com

ADDENDUM TO MINERAL PROPERTIES SALE AND PURCHASE AGREEMENT

        IN RESPECT OF PRIMARY LICENCES
No.
        __________,
____________, ___________, ___________and _____________

WHEREAS Director with Company (the Purchaser) and
____________ in Partnership with ____________________________(“the owner”)
entered into mineral properties sale and purchase agreement on the 21st
day of May, 2009 in respect of the above mentioned Primary Mining Licence
(“the Agreement”). 

WHEREAS under clause 2.1.5 of the agreement the parties
have agreed that the purchaser has options for a final buy out as follows: 

Tshs ________________or the pro- rata portion of two percent
(2%) of the Net Smelter Production, at the option of the Purchaser, for each PML
listed on Schedule A that the Purchaser desires to finalise the purchase option
of such Final Buy out Payment to be paid on or before 730days made in 2.1.2,
2.1.3 and 2.1.4 herein.

NOWTHEREFORE, the parties have agreed to add into the
content of said clause 2.1.5 of the said agreement as follows:

Addition of a sentence...or 2% of the Net Sale Value immediately
after the words 2% Net Smelter production.

Also, the Purchaser may return licenses in the event no viable
discovery is made, within 540 days from the date of secondary payment. In the
circumstance, the purchaser shall not be liable to the final buy out.

Signed and Delivered on the date first appearing
hereinabove by the duly authorized representatives of:

DIRECTOR WITH COMPANY

By    :    Purchaser

Title :    ________________________________

Date :    ________________________________

________________________

By    :  
_______________________________

Title :  
_______________________________

Date :  
_______________________________

________________________

By    :  
_______________________________

Title :  
_______________________________

Date :  
_______________________________

_______________________

By    :  
_______________________________

Title :  
_______________________________

Date :  
_______________________________Lake Victoria Mining Company, Inc.: Exhibit 10.18 - Filed by newsfilecorp.com

SECOND ADDENDUM TO

MINERAL PROPERTIES SALE AND
PURCHASE AGREEMENTS 
ENTERED INTO PRIOR TO 2010 IN RESPECT OF

Primary Mining Licenses No.
____________,___________,___________,__________,_________

(the
“Licenses”)

BETWEEN: 

DIRECTOR WITH COMPANY of P. O.
Box _________, Dar es Salaam, United Republic of Tanzania, a director and
shareholder of Geo Can Resources Company of P.O. Box _________, Dar es Salaam,
United Republic of Tanzania

(hereinafter called the “The
Purchaser”) 
(Of the First Part)

AND:

_______________ in partnership
with ___________________________of P.O. Box ___, _____________, United Republic
of Tanzania 

(hereinafter individually referred to
as an “Owner” and collectively referred to as the “Owners”)

(of the Second Part)

WHEREAS:

	(a) 	The Purchaser and the Owners entered into a
      Mineral Properties Sale And Purchase Agreement dated 21st May
      2009 in respect of the above mentioned Licenses as amended by an addendum
      between the parties dated 18th Sept 2009 (the “Agreement”).
  
	  	 
	(b) 	The Owners have received the Initial Payment
      and a second payment of the Initial Payment pursuant to 2.1.1 of the
      Agreement to extend the date for the Secondary Payment to 240 days after
      the execution date of the Agreement. 
	  	 
	(c) 	The Purchaser has advised the Owners that the
      Purchaser is planning and preparing for the payment of the Secondary and
      Final Buy Out Payments according to this Second Addendum.

NOW THEREFORE THIS AGREEMENT WITNESSES that in
consideration of the payments outlined in amended clauses 2.1.3 (i) and 2.1.4
(i) to be paid by the Purchaser to the Owners, the parties agree as follows:

	1.0 	
      The above recitals are true and correct and form part of
      this Amendment.

	 	 
	2.0 	
      Clause 2.1.3 of the Agreement is deleted and replaced
      with the following:

	 	“2.1.3 The Secondary Payment for each Producing PML of
      Tsh ____________listed on Schedule A shall be paid either
      (i) on or before 120 days after the execution date or (ii) 240 days after
      the execution date if a second Initial Payment was made and shall be paid
      in two payments of 50% each as follows: 

	 	(A) 	
      First payment of 50% paid as follows:

	 	 	 	 
	 		(i) 	
      20% being paid immediately upon execution of this Second
      Addendum by the Owner (the “Execution Date”); and

1

	 	(ii) 	30% two weeks after the Purchaser has received
      written confirmation of the transfer of  the PML(s) from the
      Commissioner; and 
	 	
	 	(iii)	50% within six months of the Execution Date.
  

	 	(B) 	
      50% of Secondary Payment within twelve months of the date
      of execution of this Second Addendum.”

	3.0 	
      Clause 2.1.4 is deleted and replaced with the
      following:

	 	 
		
      “2.1.4 The Secondary Payment for each Non Producing PML
      of Tsh ___________listed on Schedule A shall be paid either
      (i) on or before 120 days after the execution date or (ii) 240 days after
      the execution date if a second Initial Payment was made and shall be paid
      in two payments of 50% each as follows:

	 	(A) 	
      First payment of 50% of Secondary Payment paid as
      follows:

	 	(i) 	20% paid immediately upon execution of this
      Second Addendum by the Owner (the “Execution Date”); and 
	 	             
	 	(ii) 	30% two weeks after the Purchaser has received
      written confirmation of the transfer of  the PML(s) from the
      Commissioner; and 
	 	
	 	(iii)	50% within six months of the Execution Date.
  

	 	(B) 	
      50% of Secondary Payment within twelve months of the date
      of execution of this Second Addendum.”

	4.0 	
      Upon execution of the Second Addendum Agreement, payment
      of the initial 10% and the transfer of title of the PML to the purchaser,
      the Purchaser and any subsequent transferee or assignee of the Purchaser
      (“New Purchaser”) shall have free and unencumbered access to the areas
      encompassed by the Licenses and PMLs to carry out all exploration and
      development activities and operations without restriction including,
      without limiting the generality of the foregoing, sampling, geological and
      magnetic surveys, drilling and building and operating a pilot plant
      without limitation.

(The balance of this page left blank on purpose.)

2

IN WITNESS WHEREOF the parties hereto have executed this
Agreement as at the day and year first above written.

NOW PARTIES in this agreement set their hands in the following
manner:

I, ______________________________________Advocate have gone
through this agreement in the presence of __________________________________or
and on behalf of the Owner(s) in this agreement and I have read the contents of
the agreement to him of which he has understood and has now set his hand to
acknowledge and accept the terms and conditions of the agreement.

For the Purchaser:

	SIGNED and DELIVERED at _______________	 } 	  
	by the said DIRECTOR WITH COMPANY who 	 }	  
	  	 }	  
	is known to me
      personally/Identified to me by 	 }	  
	this __25th___ day of __January______2010 	 }	

BEFORE ME:

Name:  ___________________________

Signature:
_________________________

Address  
_________________________
                 
 _________________________

Qualification _______________________

For the Owners:

	SIGNED and DELIVERED at ________________	 } 	  
	the said ______________________	 }	  
	who is known to me personally/identified to me by 	 }	 
	  	 }	                                                   
	this__________day of ____________2010. 	 }	

BEFORE ME:

Name ____________________________

Signature
_________________________

Address
__________________________
                
__________________________
 
Qualification
_______________________

3

	SIGNED and DELIVERED at ________________	 }	  
	the said ________________________	 }	  
	who is known to me personally/identified to me by 	 }	 
	  	 }	                                                   
	this__________day of______________ 2010. 	 }	

BEFORE ME:

Name ________________________

Signature
_____________________

Address
______________________
                ______________________

Qualification
___________________

	SIGNED and DELIVERED at ___________________	 }	  
	the said _________________	 }	  
	who is known to me personally/identified to me by 	 }	 
	  	 }	
	this__________day of _________________2010. 	 }	

BEFORE ME:

Name _______________________  

Signature
____________________

Address
_____________________
               
_____________________

Qualification __________________

4Lake Victoria Mining Company, Inc.: Exhibit 10.19 - Filed by newsfilecorp.com

THIRD ADDENDUM TO
MINERAL PROPERTIES SALE AND
PURCHASE AGREEMENTS 
ENTERED INTO PRIOR TO 2010 IN RESPECT OF

Primary Mining Licenses No. ________, _______, _______,
_______, _______(the “Licenses”)

BETWEEN: 

DIRECTOR WITH COMPANY of P. O.
Box _________, Dar es Salaam, United Republic of Tanzania, a director and
shareholder of Geo Can Resources Company of P.O. Box _________, Dar es Salaam,
United Republic of Tanzania

(hereinafter called the “The
Purchaser”) 
(Of the First Part)

AND:

________________ in partnership
with ______________________+ of P.O. Box ___, ___________, United
Republic of Tanzania 

(hereinafter individually referred to
as an “Owner” and collectively referred to as the “Owners”)

(of the Second Part)

WHEREAS:

	(a) 	
      The Purchaser and the Owners entered into a Mineral
      Properties Sale and Purchase Agreement dated 21st May 2009 in
      respect of the above mentioned Licenses as amended by an addendum between
      the parties dated 18th Sept 2009 and a second addendum to the
      Agreement dated January 24, 2010 (the “Agreement”).

	 	 
	(b) 	
      The Owners have received the Initial Payment and a second
      payment of the Initial Payment pursuant to 2.1.1 of the Agreement and have
      agreed to extend the subsequent payments.

	 	 
	(c) 	
      This Third Addendum supercedes and replaces the Second
      Addendum.

NOW THEREFORE THIS AGREEMENT WITNESSES that in
consideration of the payments outlined in amended clauses 2.1.3 (i) and 2.1.4
(i) to be paid by the Purchaser to the Owners, the parties agree as follows:

	1.0 	
      The above recitals are true and correct and form part of
      this Amendment.

	 	 
	2.0 	
      Clause 2.1.3 of the Agreement is deleted and replaced
      with the following:

“2.1.3 The Secondary Payment for each
Producing PML of Tsh __________listed on Schedule A shall be paid
as follows:

	 	(A) 	
      First payment of 50% paid as follows:

	 	 	 	 
	 		(i) 	20% being paid immediately upon execution of this Second
      Addendum by the Owner (the “Execution Date”); such payment has already
      been completed; and
	 	 	 	 
	 		(ii) 	
      30% two weeks after the Purchaser has received written
      confirmation of the transfer of the PML(s) from the Commissioner; such
      payment has already been completed; and

1

	 	(iii) 	
      60% of the 50% by July 24, 2010; which is 15% of the
      total Secondary Payment amount; and

	 	 	 
	 	(iv) 	
      40% of the 50% on October 24, 2010; which is 10% of the
      total Secondary Payment amount.

	 	(B) 	
      50% of Secondary Payment within twelve months of the date
      of execution of this Second Addendum.”

	3.0 	
      Clause 2.1.4 is deleted and replaced with the
      following:

“2.1.4 The Secondary Payment for each Non Producing PML of
Tsh ______________listed on Schedule A shall be paid in two
payments of 50% each as follows:

	 	(A) 	
      First payment of 50% of Secondary Payment paid as
      follows:

	 	(i) 	
      20% paid immediately upon execution of this Second
      Addendum by the Owner (the “Execution Date”); such payment has already
      been completed; and

	 	 	 
	 	(ii) 	
      30% two weeks after the Purchaser has received written
      confirmation of the transfer of the PML(s) from the Commissioner; such
      payment has already been completed; and

	 	 	 
	 	(iii) 	
      60% of the 50% by July 24, 2010; which is 15% of the
      total Secondary Payment amount; and

	 	 	 
	 	(iv) 	
      40% of the 50% by October 24, 2010; which is 10% of the
      total Secondary Payment amount.

	 	(B) 	
      50% of Secondary Payment within twelve months of the date
      of execution of this Second Addendum.”

	4.0 	
      Up until the Second and Final Secondary Payment of 50% is
      made for a PML, the Purchaser and any subsequent transferee or assignee of
      the Purchaser (“New Purchaser”) shall have free and unencumbered access to
      the areas encompassed by the Licenses and PMLs to carry out all
      exploration and development activities and operations without restriction
      including, without limiting the generality of the foregoing, sampling,
      geological and magnetic surveys, drilling and building and operating a
      pilot plant without limitation.

	 	 
	5.0 	
      All payments by the Purchaser are at the sole option of
      the Purchaser.

	 	 
	6.0 	
      The Agreement is otherwise in full force and
    effect.

(The balance of this page purposefully left blank)

2

IN WITNESS WHEREOF the parties hereto have executed this
Agreement as at the day and year first above written.

NOW PARTIES in this agreement set their hands in the following
manner:

I, ______________________________________Advocate have gone
through this agreement in the presence of __________________________________for
and on behalf of the Owner(s) in this agreement and I have read the contents of
the agreement to him of which he has understood and has now set his hand to
acknowledge and accept the terms and conditions of the agreement.

For the Purchaser:

	SIGNED and DELIVERED at 	 }	  
	by the said DIRECTOR WITH COMPANY who 	 }	  
	 	 }	  
	is known to me personally/Identified to me by 	 }	 
    
	this__________ day of _______________2010 	 }	

BEFORE ME:

Name: _________________________

Signature:
______________________

Address
________________________
               
________________________

Qualification _____________________

For the Owners:

	SIGNED and DELIVERED at _____________________	 }	  
	the said _______________	 }	  
	who is known to me personally/identified to me by 	 }	 
	  	 }	                                                   
	this__________day of _____________2010. 	 }	

BEFORE ME:

Name ____________________________

Signature
_________________________

Address
__________________________
                
__________________________

Qualification ________________________

3

	SIGNED and DELIVERED at __________________	 } 	  
	the said ___________________	 }	  
	who is known to me personally/identified to me by 	 }	 
	  	 }	                                                   
	this__________day of ____________2010. 	 }	

BEFORE ME:

Name ____________________________

Signature
_________________________

Address
__________________________
               
__________________________

Qualification _______________________

	SIGNED and DELIVERED at ____________________	 }	  
	the said ______________________	 }	  
	who is known to me personally/identified to me by 	 }	 
	  	 }	
	this__________day of ______________2010. 	 }	

BEFORE ME:

Name _____________________________

Signature
___________________________

Address
___________________________
              
____________________________
                 

Qualification _________________________

4

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