Hi Greg,

After Ogden, Smith & Hussey got out of the gun business H.H. Hussey or at least his good will went on to form Harrison & Hussey. Cogswell & Harrison is the current iteration of that chain of firms and they DO have some Hussey records. They are on the web and they do respond to inquiries.

Overall, I find the Brits to be very patient and willing to give out information on there old guns liberally.

I'm confident more clues can be uncovered
As to the history of the rook rifle in question.