Thought to be one of the finest angling books ever produced according to many. I have to agree it does make very good reading and if you haven't read it then it something to pass away a few hours with a glass in your hand.
Stewart fished a trio of wet flies in a team on the Scottish rivers in the last century which he killed literally thousands of trout, the trio being the Black Spider, the red Spider & the Dun Spider. Not that I would Kill thousands in this day and age but I'd certainly be glad of a few fish each time I went out for sport.
W.C Stewart's Black Spider
W.C Stewart's Dun Spider