Well it came into my local gunshop from an estate sale and I just cant resist a new toy, particularly one I've not seen before. This is a Issac Hollis & Sons 442 rook rifle and the bore is rust free which I would rat 8+/10, shiny with no blemishes from one end to the other. I have two original cartridges from my collection.
Action is a scaled down Martini Henry
2 original cartridges with a 44 Russian case for comparason
I have found a reference to a 442 Webley on the CH4D website and I think the 44 Russian cases can be reformed.
https://tecmagex.com/en/ch4d-die-set-442-webley.html