Beautiful tin; I'm sorry it was compromised. Hopefully the rehydration will work!
As for the originator of the blend, the cursive script utilized at this time is deceptive in the extreme. The name really reads "D. Ritchie & Co.". Yes, I know it doesn't look like that, but trust me: that's what it says.
I'm sorry I don't have time for a real write-up, but in brief David Ritchie was born in Ireland in 1852, immigrated to Canada in 1865, and set up shop in Montreal about 1876 under the name Dominion Cut Tobacco works. The business operated out of various addresses before being bought in 1895 by the newly formed American Tobacco of Canada as part of their roll-up of the Canadian cigarette industry. ATC in turn was swallowed up by Imperial Tobacco of Canada in 1908, a by-product, as I recall, of the turbulence surrounding the anti-trust activity then targeted at American Tobacco.
Incidentally, if you track down an image of one of the Ritchie tins the cursive is more obviously a rendition of "D. Ritchie & Co."