Are there any known rifles by James Lakenan, Jacob Hawken's partner in St Louis? Where was Lakenan born? For whom did he apprentice? Who is James Lakenan?
The only source I know of for information on James Lakenan is Hanson's
The Hawken Rifle: Its Place in History. Appendix C of that book suggests that James Lakenan was from Essex County, Massachusetts. It is believed he left New England and came to Richmond about 1801 to work in the Virginia Manufactory. He apparently was a gunsmith at that point. No info on where he apprenticed, but if the info about Essex County, Mass. is correct, then likely somewhere in New England. Lakenan worked at the Virginia Manufactory for several years, leaving in 1818 for St. Louis.
Hanson does state that he thinks James Lakenan may have had influence on what was to be developed as the Hawken mountain rifle. He shows a picture (page 47) of an early Virginia Manufactory rifle, iron mounted, and notes the similarities to the classic J&S Hawken rifle. Hanson makes no mention of any rifles by James Lakenan. If he had known of any, I'm sure he would have mentioned them to either strengthen or dispel Lakenan's influence.
Hanson seems to imply that Jacob Hawken and James Lakenan may have known each other before moving to St. Louis. He states, "It seems much more than coincidence that James Lakenan and Jacob Hawken were both working at public armories in the same state, apparently left those jobs within a month of each other, and turned up in the St. Louis area in the fall of 1818."