The collection provides primary documentation of the material design and construction of a mansioned commissioned by the lawyer A. Frank B. Chace and located at 5 Willard Place in Hudson, N.Y. Included are two versions of Croff's "General specifications for the enaction, construction and all requiste material.." (June 1874); two draft proposals and final 26 page contract, with detailed specs, for building the house made with Morris & O'Connor, of Rhinebeck, N.Y. (October 1874); 18 pieces of correspondence, both brief and detailed, from Croff to Chace, with one regarding his book and including a printed prospectus of it; a full run of payment receipts from builders Morris & O'Connor; and a small batch of bills for various materials relating to the house.