I've been tying and researching flies since the 1990s. The Shannon, Goldfinch and Ondine were earlier flies, published in Ephemera (Fitzgibbon). He wrote in Bell's Life before (and after) his own books were published. Those books are available on-line through Google books, the Biodiversity Library, archive.org, hathitrust.org, and other sites.
As for tying the flies, I tied a couple Ondines many years ago. The blue peacock was not easy to work with, and I used small green peacock feathers as subs for the trogon wraps. They weren't the exact green -- lighter in shade and denser, now that I've compared them with a real feather -- but were iridescent. I'll see if I can find the fly and post it. Otherwise, time for another in the vise.
If you're interested in patterns and sources, I'll definitely be glad to help.
As for learning to tie, I and others here are always glad to take questions. (There are also a couple sites and Facebook that are a little more active, though this was the first -- or one of the first.)