Well, it seems that Samuel Buckley & Co. were made by I. Hollis and Son from 1862 to 1900. Source says these where sold by J. Palmer O'Neill & Co. and by H&D Folsom Arms Co. in the 1880's. This from someone named Donald Buckley in 2002 through Ron Gabel's site, GabelGuns.com
Hmmm, interesting, in that if Buckley was in BSA, so were Hollis and so was Charles Playfair. I'll have to see where my Playfair rebounding hammer gun is and take a look at the lines of the gun. I don't think that is what the Buckley gun reminds me of but at least it's a place to start. Hollis at least did market guns in the US around this period and did make guns for the trade right?