Harry Manners , Harry Selby , Samuel Baker , F C Sealous , WDM Bell , Wally Johnson , Finn Aagaard , Tony Sanchez Arino , Ivan Carter , Mark Sullivan ... You name it . Whenever l read about a hunter , l take the specifics down
I think this would be a wonderful subject to start a thread. (unless you plan to publish in a separate book)
i am also sure that many of the knowledgeable members might chime in, and update your findings!
From my side, I could offer some info, I have a book "Hemingway's Guns: The Sporting Arms of Ernest Hemingway".
On Hemingway I could make few points. For all others you mention, I am sure you have better data base.