Contract and specifications for four Gunboats of the Algerine Class (1857)

A 7 page contract with 7 pages of specifications for four Gunboats of the Algerine Class (1857) [Algerine, Lee, Leven and Slaney] between the Admiralty and William Pitcher of Northfleet in the County of Kent, dated 22 September 1856 and signed.
The specifications bound to the contract are apparently a corrected version (handwritten corrections in black ink) of those of the Albacore Class (the Algerine Class was an enlarged version of the Albacore Class).
There is a second copy (separate) of specifications with the right figures (printed) for the Algerine Class.

ADMB0781