Thanks Harry; and everyone else, I will look out for the book becoming available but if you know of a source to try then could you please send me a message and I will try to get hold of one. I will be going to an RR shoot on the 2nd. of October. The person I am going with has a number, some with very odd actions, and a mint double .360 pin-fire by Gates of Derby; cased too! Great fun to shoot. I posted a photo of a double .300 side by side with one barrel .410 by Rosson of Derby quite recently. I only wish that I could have bought more many years ago when they were going for a song. I was offered a .300 Holland & Holland in mint condition and cased about 30 years back for just £30 but then they had to be justified on a Firearms Certificate and that was not easy to do when ammo was not available. I would be worth about £1,000 to £1,500 now. Lagopus.....