This image was in the July 24, 1886 'Scientific American' and Parker catalogs showing 6 Iron Crolle production
Several damascus demonstration rods, including Dr Gaddy's are here
http://www.picturetrail.com/sfx/album/view/20091342
Letters in
The Chicago Field in 1878 state that a barrel forger named John Blaze of Birmingham, England had immigrated to America to make Wesson's barrels. He was listed in the 1865 Worchester, Mass. City Directory as a 'Gunsmith', and 1878-1881 as a 'Blacksmith.' Whether he left Wesson for Parker's employ after Dan Wesson shut down his shotgun production in December 1870 is uncertain. He
MAY have produced a Crolle Pattern Damascus barrel for Wesson, and Twist and Laminated steel barrels for Parker Bros. c. 1877-1880
MUCH more here including John Davis' article
http://docs.google.com/Doc?id=dfg2hmx7_1742r4n6vcz