Hi 999: yes, that Mercury label remains just tantalizingly below what I can read, and I'm not adept enough to enlarge it either. Nice find though! I hope someone can spot the credit and let us know.

The Erik Darling and Fred Neil versions of "Baby Did You Hear" given above are of course later covers, both coming well after the Ives and Washington recordings. They do help show how this mysterious little song worked its wiles on a few later folk and pop singers alike.