I have received the following from Tom Rowe regarding the next set of Pope books covering the Stevens Pope rifles.

I am working on theStevens Pope books and the concrete is starting to harden. I have between 900 and 1000 pages so it will be three volumes. If an owner wants their rifle photographed I will be at the Denver Gun Show in May or they can email details of their rifle to me at Rowebooks1@gmail.com. No, I don't know when it will be done—not soon but getting there. 
Thanks 
Tom Rowe