Interesting that I "may" have an Alexander Henry rifle that could be attributed to Colonel (later Major General) C.G.Gordon......
Logged in Henry records on 31AUG1872 and sold to one "Col. Gordon".
So perhaps THE "China" Gordon or later "Gordon of Khartoum".

Not that my research is unimpeachable, but I can find no other "Colonel" Gordon in online British Army records that fits the 1872 time frame.
At any rate a very nice and fully shootable 1870 Patent Hammerless in .577/.450 MH.
28" barrel, 7lbs 14oz, 13 7/8' LOP

This posted mostly for the British History buffs........and I am interested in knowledgeable comment.
More pictures later if I can get IMGUR to cooperate.

- Mike