Did he say what this one was called? I saw this pattern somewhere before, I think it was referred to as "The Pusher" but, I'm not sure. I'm on the look out for 2 of his original patterns. One is called "Spruce Creek Fly" another is called "Harvey's Favorite" I found a rendition of the "Night Pusher" There are step by step pictures on this web site: http://flyfishingcts.blogspot.com/2020/03/simple-but-deadly-george-harveys-pusher.html
Here is the recipe.
Materials:
sz6-4 2xl-3xl streamer hook
any ol' black thread
golden pheasant neck feathers
black dubbing
grizzly rooster saddle
black hen hackle
pheasant neck feathers