Hello Sliver,
Most, if not all of the better known British Gunsmiths offered Rook Rifles for the best part of forty years towards the end of the 19th.C. and the first decade or so of the 20th.C.
Some of these would be bought in, in a part finished condition and the gunmaker would do the final setting up and fitting, then stocked it and engraved their name on the barrel.
Thanks to Wal Winfer it is now known that many of the 'famous names' in British Gunmaking bought actions in and built finished rifles from them. Greener, Webley, Francotte and smaller makers are all suspected, or known, to have been supplying the trade with actions. Army and Navy and perhaps E.M.Reilly & Co just sold complete rifles they had bought in, and all they actually did was engrave their names on finished items.
Most of these are charming little rifles and were very reasonable priced, they were very popular with both landowners and gamekeepers for keeping down vermin at ranges beyond that of a shotgun. Eventually they fell out of use because of improvements in .22 rimfire ammunition, which was also considerably cheaper to buy and just as efficient at the ranges these Rook & Rabbit Rifles were generally used.
The English author Colin Greenwood has a book out on these rifles and their ammunition, and I understand Wal Winfer also has one nearly ready for publication. The rapid increase in prices being paid for these rifles is due mainly to good specimens being hard to come by these days, sadly not all of them were treated with the reverence due to them in the days of BP and early nitro powders and corrosive primers.
Harry