My clutch had a flap, which looking back, wasn’t exactly ideal. I should have used a flat one with a zipper closure, but whatevs. I hot glued the feathers on in a row, cutting them to a length so they just overlapped the bottom of the flap.
Then I kept gluing in layers, working my way over the top and toward the back, covering the quills as I worked. [Tip: make sure you glue down the tips of the quills so they don't poke out of the feathers].
When I reached the top of the clutch, I folded the feathers over and glued them down on either side.
Finally, I repeated the layers from the front on the back side, covering the tips of the quills under other feathers as I went, and glued a few feathers down the sides of the clutch to cover as much ivory leather as possible.
From start-to-finish, the project took about 40 minutes. Clean-up took a good chunk of that time, because little pieces of down floated everywhere. But I’m happy with the result!