First off let me say that there are probably dozens of ways to tie this fly. This is only one method that seems to work well for me & my somewhat limited tying skills. So, to prepare the fly, tie in a layer of thread on the front 3rd (towards the eye) of the hook hook shank, you don't need to go all the way back to the bend. Then:
1.) Tie in two feathers in about the middle of the hook. These should have the longest hackles possible. Tie them in by the base, (or wide end) of the feather. It helps to tie the longer of the two in first, then the shorter one (if they're not exactly the same length) just in front of it.
2.) Wrap the smaller of the two feathers up the length of the hook, just like you would regular hackle on a winged dry fly. When you get to around 1/8 inch from the hook eye, tie the feather off.
3.) Now wrap the other feather up the hook in the same way as the first, this time winding the feather in between the wraps of the first. When you get to just behind the eye of the hook, tie it off leaving enough room to secure the feather well.
4.) Take both feathers & bunch them together on the hook with your fingers. Don't use any tools for this, as you might damage the feathers. Just push both feathers together toward the middle of the hook. You don't have to push very hard, only enough to make the hackles stand out a little more from the hook shank & give them a definite shape.
When fishing with this fly, you're going to have to apply some floatant. One way to help the hackles ride high on the water & not get water-logged is to apply a thin layer of head cement to the ends of the hackles when you finish tying this pattern. Put a small dab of head cement on your thumb & index finger, then gently pull the hackle tips between your thumb & finger, lightly coating the hackles. It's best to do this while it's still in the vice.
There you go. A simple dry fly that's quick & easy to tie & can work wonders between hatches at the right time of year. If you haven't given this fly a try, go for it. It won't take long to tie up a mess of them, & you just might find a new "go-to" fly for prospecting trout.