Document:

Bridgeport Ventures Inc. - Exhibit 4.17 - Filed by newsfilecorp.com

Exhibit 4.17

AMENDMENT OF OPTION AGREEMENT FOR PURCHASE OF MINING
CONCESSIONS

RIO CONDOR RESOURCES S.A. 

AND 

SOCIEDAD LEGAL MINERA TAMARA I UNA DE LA SIERRA SAN MARCOS

 

In Copiapó, on , on November 5th 2009, before me, HERNAN
  CAÑAS VALDES, Lawer, Public Notary and Permanent Mining Conservator
  of this Province with trade in O’higgins street number 776, there appear:
  RIO CÓNDOR RESOURCES S.A., closely held stock corporation engaged
  in the mining business, , TPN 76,072,443-2, properly represented, as will be
  evidenced by Mr. Francisco Schuberts Seiffert, Chilean, married, mechanical
  engineer, national identification card No. 6,095,824-6, both domiciled in the
  city of Santiago, and in transit through this city, at Camino del Sol Number
  3895-7, municipality of Lo Barnechea, hereinafter indistinctly “RCR”
  or the “Beneficiary” for one part; and for the other SOCIEDAD LEGAL
  MINERA TAMARA I UNA DE LA SIERRA SAN MARCOS, properly represented by its
  shareholders (i) CLAUDIO LINDOR LÓPEZ GONZÁLEZ, Chilean, divorced,
  miner, national identification card No. 8.980.645 -3, domiciled at Juan López
  No. 398, Estación Paipote, Copiapó, for 40 shares, (ii) SOCIEDAD
  LEGAL MINERA ELIANA I UNA DE LA SIERRA SAN MARCOS, properly represented
  by its shareholders Mr. JAIME BARAHONA BALBONTÍN, Chilean, married,
  miner, national identification card No. 8.893.132 -7, domiciled at Salitrera
  Laguna No 2210, villa El Palomar, Copiapó, and Mr. CARLOS BARAHONA
  TIRADO, Chilean, married with separation on marital property, miner, national
  identification card No. 12,803,560-5, domiciled at Parcela No 16, Nantoco,
  municipality of Tierra Amarilla, for 30 shares, and (iii) SERVICIOS JURÍDICOS
  E INVERSIONES KOPIAP Y COMPAÑÍA LIMITADA, represented by Mr.
  JULIO CÉSAR MORALES NEYRA, Chilean, married with separation on marital
  property, lawyer, national identification card No. 6.292.989 -8, both
domiciled at Colipí No 660. Copiapó municipality, for 30 shares, hereinafter
indistinctly “Tamara” or the “Offeror”, the appearing parties of legal age, who
evidenced their identity with the aforementioned cards and state:

FIRST. ANTECEDENT. 

	1.1 	
      With date November 5, 2009, RCR and the Offeror enter
      into a Option Purchase Contract of mining concessions (the “Contract”),
      regarding the mining concession claims called “TAMARA I 1 to 9”,
      whose constitutive sentence and survey certificate are registered on
      folio 588 over number 163 of the Registry of Property corresponding to the
      year 2007 of the Registrar of Mines of Copiapó. The Contract was delivered
      by public deed of this date and this same Notary, under the repertory
      number 1990-2009.

	 	 
	1.2 	
      In the Seventh clause of the Contract , the parties
      agreed an overprice, consisting in a Royalty or NSR that RCR should pay to
      the Offeror once the mining claims start producing, according to the
      mentioned clause.

SECOND. AMENDMENT OF THE CONTRACT.

2.1 By this act, the parties agree to leave without
effect the seventh clause of the contract, which must be understood eliminated,
without leaving any obligation of RCR of paying a Royalty or NSR in favor of the
Offeror; the parties by this act attest that they have no obligations in
regarding this clause.

2.3 In accordance with 2.1, it is understood that Eight
clause will be now, Seventh clause, the Ninth clause will be the Eight clause,
and successively.

THIRD. WHAT IS NOT SUBJECT OF AMENDMENT.

In everything that is not modified by this document, the
Contract is completely in force and in effect, from which this Amendment will be
understood as a part for every legal and contractual effect.

FOURTH. AUTHORIZATION.

It is placed on record that the Offeror has been expressly
authorized by its shareholders to enter into this Contract, understanding the
parties that such authorization is precisely for reaching this amendment. The
mentioned authorization is registered in resolutions taken at the General
Shareholders Meetings evidenced by public deed delivered before this same Notary
with date November 5, 2009, Repertory 1989-2009.

AUTHORITIES 

The authority of Mr Francisco Schuberts Seiffert to
appear on behalf of Rio Cóndor Resources S.A. is evidenced in public deed
delivered on July 3, 2009 in the Notary of Santiago of Mr. Raúl Iván Perry
Pefauer, which is not inserted as it is known to the parties and to the
attesting Notary. The authority of Mr. Julio César Morales Neyra to
appear on behalf of SERVICIOS JURIDICOS E INVERSIONES KOPIAP Y COMPAÑIA
LIMITADA is evidenced in public deed delivered on August 9th,
2002 in Notary of Copiapo of Mr. Luis Contreras Fuentes, which is not inserted
as it is known to the parties and to the attesting Notary. 

/s/ Francisco Schuberts Seiffert                                   

Francisco Schuberts Seiffert

/s/ Claudio Lindor Lopez Gonzalez                               

Claudio Lindor Lopez Gonzalez 

/s/ Jaime Barahona Balbontin                                       

JAIME BARAHONA BALBONTIN

/s/ Carlos Barahona Tirado                                           

CARLOS BARAHONA TIRADO

/s/ Julio Cesar Morales Neyra                                        

Julio Cesar Morales NeyraBridgeport Ventures Inc. - Exhibit 4.19 - Filed by newsfilecorp.com

Exhibit 4.19

LETTER OF INTENT – OPTION AGREEMENT 

In Copiapó, June 23rd of 2010, appears Mr. Nelson
Onofre Roa Barahona, national personal identification document No 7.501.315 -9,
Mr. Eric Leopoldo Roa Barahona, national personal identification document No
9.592.648 - 7, Mr. Gabriel Emilio Roa Barahona, national personal identification
document 7.150.733 -5 and Mrs. Rosa del Carmen Roa Barahona, national personal
identification document No 9.367.996 -2, who appears individually and in
representation of the mining legal society which will be created regarding the
mining property referred in this document, all domiciled in Parcela 7, Nantoco,
Tierra Amarilla municipality (hereinafter all referred as to the “Seller”), in
one hand; and in the other, Río Condor Resources S.A., represented by Francisco
Schubert Seiffert, national personal identification document No 6.095.824 -6 and
Mr. Marcelo Antonino Olivares Cabrera, national personal identification document
No 10.703.661 -K, all domiciled in Santiago City, Camino del Sol street No
3895-7, Lo Barnechea municipality (hereinafter all referred as to the “Buyer”),
who have agreed the following Letter of Intent: 

This letter of intent defines the general terms agreed between
the parties for the signature of the option agreement in accord with the article
169 of the Miner Code’s rules, for the acquisition of the following mining
property. 

TRILLADOR 1 al 14, registered at sheets 1.040 vta, No 167, of
the Registry of Property year 1994 of the Mining Conservator of Copiapó,
including its demasías and other mining concessions, in process or constituted,
that covers total or partially the domain of the Seller or other persons related
to her.

This mining claim is located approximately at 60 km. south east
of the city of Copiapó and whose characteristics will be totally defined in the
final agreement. 

Once the letter of intent is signed, the Buyer has 30
business days to study the titles and preference with third party. Once this has
been concluded, and being accepted, he promises to sign the final agreement at
latest seven days after the mentioned final check.

Payments.

1. Together with the signature of the agreement a payment of
US$ 50.000 is made. 

2. 12 months after the signing of the agreement a payment of
US$ 50.000 is made. 

3. 24 months after the signing of the agreement a payment of
US$ 60.000 is made. 

4. 36 months after the signature of the agreement a payment of
US$ 250.000 is made 

5. 48 months after the signing of the agreement a payment of
US$ 1.090.000 is made. 

Once all the payments have been made, the Buyer shall be
the owner of 100% of the property. The total payments are understood when
completing US$ 1.500.000. -., that is and will be the unique price of the sales
contract. This amount of money will be distributed in
the following percent to the persons in each case indicated: Nelson Onofre Roa Barahona: 40%; Eric Leopoldo Roa Barahona: 20%; Gabriel Emilio Roa Barahona: 20%; and Rosa del Carmen Roa Barahona: 20%.

The Buyer has the right to withdraw from the agreement at any moment and in such case will have no future obligation of any kind with the Seller and all the payments which have been made at that date will remain in the hands of the
Seller, without the obligation to return them as indemnification for the damages that may have been caused to it because of having been linked to such agreement. 

In case of advanced termination of the agreement, the Buyer will deliver to the Vendor all the documents and antecedents of studies that they have made. 

During the effectiveness of the contract the Vendor is entitled to continue exploiting the mine at the rate of 2.000 tons per month until the date of the last payment by the Buyer of the Option Agreement, exploitation that will be made
in coordination with the Buyer. In any case, the Buyer will guarantee to the Seller the right to exploit during two years, starting in the date of the Agreement Option, even when the Buyer makes the option mentioned
before that date.

The Buyer is entitled to transfer this contract to a third party at the moment it deems it convenient. In such case the new buyer must assume all the obligations of this agreement with the original Seller. 

The Seller is obligated exclusively with the Buyer in respect to the mining concession claims, not being able to offer them to a third party meanwhile the present Letter of Intent is in force and effect. If he does or makes an
agreement for them, the Seller may sue them for compensation for damages in accord with the law.

Encumbrances 

Mortgage: The Seller states that at this date the mining concession claims, which are matter of this Letter of Intent, are subjected a mortgage of first grade on behalf of ENAMI, registered at sheet 70 No 29 of the Registry of Mortgages
and Encumbrances year 2008 of the Mining Register of Copiapó.

Prohibition: The Seller as well declares that at this date the mining concession claims which are matter of this Letter of Intent, are subjected of a prohibition to transfer, encumbrance and celebrate acts and contracts on behalf of ENAMI,
registered on sheet 24 No 16 of the Registry of Prohibitions and Interdictions year 2008 of the Mining Register of Copiapó. 

The Seller is obligated to make all the necessary performances to make appear ENAMI accepting all the mentioned conditions, being an essential condition for the signature of the Option Agreement. 

This Letter of Intent is the final and only agreement for the mining concession claims which are subject matter of the promised Option Agreement.

This Letter of Intent is signed and authorized in two identical
copies, each one in power of each party.

The legal capacity of Mr. Francisco Schubert Seiffert
and Mr. Marcelo Antonino Olivares Cabrera as representatives of Río
Cóndor Resources is stated in public deed dated December 15th of
2009 issued in Notary of Santiago of Mrs. Antonieta Mendoza Escalas, which is
not attached for being known by the parties and the authorizing Notary.

	Nelson Onofre Rosa Barahona 	There is a signature and a fingerprint 
	I.C. 7.501.315-9 	  
	Seller 	  
	  	  
	Eric Leopoldo Roa Barahona 	There is a signature and a fingerprint 
	I.C. 19.592.648-7 	  
	Seller 	  
	  	  
	Gabriel Emilio Roa Barahona 	There is a signature and a fingerprint 
	IC. 7.150.733-5 	  
	Seller 	  
	  	  
	Rosa del Carmen Roa Barahona 	There is a signature and a fingerprint 
	IC. 9.367.996-2 	  
	Seller 	  
	  	  
	Francisco Schubert Seiffert 	There is a signature and a fingerprint 
	IC 6.095.824-6 	  
	pp. Río Condor Resources S.A. 	  
	Buyer 	  
	  	  
	Marcelo Antonino Olivares Cabrera 	There is a signature and a fingerprint 
	I.C. 10.703.661-K 	  
	pp. Río Condor Resources S.A. 	  
	Buyer

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