Exhibit
4.73


Execution Version


Notice of
Assignment in relation to Talisman Parent


	
  To:

  	
   

  	
  Talisman Energy Inc.

  
	
   

  	
   

  	
  Suite 3400

  
	
   

  	
   

  	
  888-3rd Street S.W. Calgary

  
	
   

  	
   

  	
  Alberta

  
	
   

  	
   

  	
  Canada T2P 5CS

  



 


m.v.
“BLEO HOLM” (the “Equipment”)


We refer to the guarantee
given and delivered by you, Talisman Energy Inc., to us, Bluewater (Floating
Production) Limited (the “Assignor”)
dated 29 November 2005 (the “Guarantee”)
relating to an bareboat charter of the Floating Production, Storage and
Off-loading Vessel Bleo Holm for the Ross Field dated 30 November 2005 (the “Contract”).


We hereby give you
notice:


1                                that,
by a General Assignment (the “Assignment”)
dated 29 June 2006 made between (inter alios) us and ING Bank N.V. (the “Assignee”), we have assigned to the Assignee all of our
rights, title, interest, and benefit (present and future, actual and
contingent) in, to, under and pursuant to (inter alia) the Guarantee including
(but without prejudice to the generality of the foregoing) our rights to
receive certain monies and make certain claims for damages under and pursuant
to the Guarantee; and


2                                that,
unless and until you receive notification from the Assignee or ING Bank N.V.,
you are irrevocably authorised and instructed to pay all amounts payable to us under
and pursuant to the Guarantee to account name “BFP Assigned Account”, account
number 02.00.22.158, with ING Bank
N.V., acting through its Amsterdam head office, or to such other account as ING
Bank N.V., acting for these purposes as the agent of the Assignee, may from
time to time direct;


3                                that
each amount paid by you in accordance with paragraph 2 above shall discharge,
by a corresponding amount, your payment obligations under the Guarantee.


Please acknowledge
receipt of this notice by signing the acknowledgement endorsed on the enclosed
duplicate of this notice and returning that duplicate direct to the Assignee at
the address shown, with a copy to us.


For and on behalf
of

Bluewater (Floating Production) Limited

by its duly authorised attorney-in-fact


	
  

  	
   

  	
  /s/ [ILLEGIBLE]

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  	
   

  
	
  Dated 29 June 2006

  



 


 


Confirmed and
agreed.

ING BANK N.V.

by its duly authorised attorney-in-fact


	
  

  	
   

  	
  /s/ [ILLEGIBLE]

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  	
   

  
	
  Dated 29 June 2006

  














Acknowledgement of
Assignment - Talisman Parent Guarantee


	
  To:

  	
   

  	
  ING Bank N.V.

  
	
  Copy:

  	
   

  	
  Bluewater (Floating Production) Limited

  



 


We acknowledge receipt of
the notice set out above and consent to the reassignment and assignment
referred to therein. For the avoidance of doubt, this acknowledgement shall not
be interpreted as affecting in any manner our rights pursuant to the quiet use
and enjoyment letter dated 12 July 2006 between ING Bank N.V., as agent for the
lenders, various Bluewater companies, Talisman Energy Inc. and Talisman Energy
(UK) Limited.


For and on behalf
of

Talisman Energy Inc.

by its duly authorised officer


	
  

  	
   

  	
  /s/ [ILLEGIBLE]

  	
   

  	
   

  
	
   

  	
   

  	
   

  	
   

  	
   

  
	
  Dated 12 July 2006.

  



 



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