Excellent article Dr. Dabbs.
I've always had an interest in the Welrod, though they're rare enough, I've never examined one close and personal.
You bring up a point there's been much discussion about on other forums, and that is how quiet can we reduce the report? It's my understanding the Welrod's design reduced report far more than any modern Suppressor, but to do that, requires using materials that degrade after a limited number of shots, or making a Suppressor that effective with reusable materials, requires dimensions that quickly become impractical. I've only heard recordings of a Welrod being fired, which isn't the same as being right next to one, and it is amazingly quiet. Not the mouse fart Hollywood erroneously portrays, but much more than any modern Suppressor I've had the pleasure of shooting.