I did the two-part article on Hollenbeck/Three-Barel/Royal Gun Companies in The Double Gun Journal, Volume Thirteen, Issues 2 and 3, and a two-parter on Baltimore Arms Co. in Volume Ten, Issues 1 and 3.

The ledger goes up to 1829, but there is nothing entered for 1825, 26, 27 and 28. The other guns in the 182x range were shipped March to August 1910.