Looked it up, it was Fincham's Treatise on Masting Ships. My specific source I used was the 2nd edition of 1843 as found on Google Books.
That makes sense - Fincham was a major part of the School f Naval Architecture with Inman. His success may, perhaps, be best described by the death notice in The Times (1859):
The death of this gentleman [John Fincham] took place at his residence at Highland Lodge, near Portsmouth, yesterday morning, in his 75th year. The deceased gentleman will be best remembered by the general public as for many years master shipwright of Portsmouth Dockyard, and more especially as the builder of the celebrated Arrogant, the first screw frigate possessed by this country, and still looked on as one of the finest of her class. Much of his time and study was devoted to the introduction of the screw propeller into the British navy. For a long period he was superintendent of the School of Naval Architecture at Portsmouth. His History of Naval Architecture, Outlines of Shipbuilding, a Treatise on Laying-off Ships, and on Masting Ships, are unequalled in the English language for the amount of research and professional knowledge they contain.
His 1843 work was at the tail end of Symonds tenure as Surveyor of the Navy, and reflects one of the 3 major views in that prolonged period of discord (Symonds' "empirical" school of shipbuilding came into conflict both with the "scientific" school led by the new class of professional naval architects and the first School of Naval Architecture (such as Fincham, Morgan, Creuze, Pearse &c.), and the "traditional" school led by Master Shipwrights from the Royal Dockyards. Quite an interesting period of time for the British Navy that period from about 1790 through 1850.