Hugh, wasn't trying to correct you but your reply prompted me to look in Nigel Brown's British Gunmakers and I noticed the Asbury name. I am going to have a look at some of my other guns from that period and see if these initials crop up elswhere.

Harry Moris is mentioned in Boothroyd's 'Shotguns & Gunsmiths'. I looked in Christopher Austyn's 'Gun Engraving' and he omits to mention him. Lagopus.....