Warren
If you check your sources for old books you might get lucky and find this one
"All Fur Flies and How to Dress Them", W. H. Lawrie A.S. Barnes and Co., Inc., 1967.
Library of Congress Catalogue Card Number; 68-14407
It discussed many styles of flies, fur preparation, dying techniques gadgets and " stuff".
There are enough patterns to keep one occupied for a long time. Interesting to note that I paid $5.00 for my copy. That's a "back then" price.
Good luck!!!

Gerry L