A famous Scottish gunmaker from Glascow patentee of the famous "Lock Fast" action, patent number 1128 of 1860.
Here's more from Micheal McIntosh's excellent book, The Big Bore Rifle, page 59;
"Lefaucheux's fastening system scarcely was durable enough to handle the relatively low preassures that shotguns created much less the substantially greater stresses endemic to rifles. Systems truely stout enough for rifles did not appear until 1859 when Henry Jones patented his T-Fastener and 1860 with the appearance of James Dougall's Lock-Fast action."
Also from Mr. McIntosh's book:
With his father as J. & J. Dougall 1837 to 1841
As James D. Dougall 1841 to 1891
As J. D. Dougall & Sons 1891 to 1929
Address from 1837 to 1850 53 Argyle Arcade, Glascow Scotland
1850 to 1929 23 Gordon Street Glasgow, Scotland
1863 to 1883 59 St James Street, London
1883 to 1893 8 Bennet Street St. James
These books are also excellent resources;
"The British Shotgun" in three volumes by I. M. Crudgington and D. J. Baker
"Sidelocks & Boxlocks" by Geoffrey Boothroyd
If you need more just let us know!