I rather like this book, although it is not a popular work, and seldom mentioned. These are the flies from it, which I have enhanced somewhat electronically.
http://www.mike-connor.homepage.t-online.de/Flies/Historical_Flies/Hodgson/hodgson.html
You can also find the original of this book as a PDF here;
http://www.archive.org/details/troutfishing00hodgrich
for viewing these and the other books in the links I posted, I can thoroughly recommend this;
http://www.docu-track.com/home/prod_user/pdfx_viewer/
the PDF Xchange viewer from Tracker software. It is free, extremely fast, and has a lot more features than any other free PDF viewer.
TL
MC