A friend recently lent me a book titled Original Oberndorf Sporting Rifles. It is about Mauser rifles by authors Speed, Schmid and Herrmann. It has a chapter on British made Mausers. The first part contains about 13 pages on Rigby including a table of Rigby rifle production and sales, 1898-1928 (includes serial no's, calibres, dates and other good info. The book is 471 pages in total, so the section on Rigby is quite small but it is an excellent book with heaps of photos and excellent information IMO. I have seen them listed on Amazon.com from about $70 US upwards plus postage. I am also interested in any books on Rigby so if you get some more details of books could you please PM me.
Thanks, Ted