Wolfgang, I contacted Frank as you suggested, and he immediately came up with the identity of the first rhyme, "Sei nicht bös'". It's from the operetta "Der Obersteiger" by Karl (or Carl) Zeller (1842-1898). He kindly supplied me with the complete lyrics (which I can post if anyone else is interested). It apparently dates from 1894. I even located a source for the CD!

He's offered to post the other one on his "Help Wanted" page.

Thanks again for the tip. If anything else turns up, I'll post it.

Bert C>