Shortly before his premature death Ron Ehlert sent me a copy of a book on Jaeger Rifles which is written in German. Jim and Barbie have this book I know. Title is:
"Steinschloss-Jaegerbuchsen
Kunstwerke der Buchsenmacher aus dem 18. Jahrhundert"
This book is awesome, and if anything more detailed has been published on Jaeger Rifles I'm unaware of it. Over 500 pages of photographs and descriptions. Unfortunately, ich nein sprechen Deutsch, so I can't read any of it! (can't write it either, can I!)