Thanks Ed-and for a preview, most of W. & W.W. Greener's stuff is now digitized
The Gun, or a Treatise on the Various Descriptions of Small Fire-Arms 1835
http://books.google.com/books?id=oIEY4qL6_z0C&pg=PA30-IA1&dq=wiswould%27s+iron#PPA1,M1The Science of Gunnery, as Applied to the Use and Construction of Fire-Arms 1841 Oxford
http://books.google.com/books?id=ThYkeKlemD8C&dq=w+greener+barrel+patentsGunnery in 1858: Being a Treatise on Rifles, Cannon, and Sporting Arms
http://books.google.com/books?id=A4TPW796iD8C&dq=w+greener+barrel+patentsThe Gun and It's Development 1907
http://books.google.com/books?id=3HMCAAAAYAAJ&dq=w+greener+barrel+patents