Take a look at the FAOL site "Old Flies and Stuff" found in "Features" and find the archived item Tups Indispensible. I found the paragraph when Skues describes how the Tups was named to be interesting.
My question would be the source of the dye the farmer used on the sponge or rag to saddle the tup so many years ago? Was it red?
I guess the fly was a favorite of Charles Ritz (" A Flyfishers Life"). I tied some years ago looking for the ultimate answer but unfortunately never put it on the water. I find the fly attractive and would certainly put it on the wall with it's history, even though I haven't caught a fish with it.
"As far down the river as he could see, the trout were rising, making circles on the surface of the water, as though it were starting to rain."- E.H., The Big Two Hearted River