Darn! There's GOT to be an answer. I even wrote to Bruce Olson, and he couldn't find it. Here's what he said:

There is a slip song in the Madden collection of broadsides (c 1775-1825) called "Old Darby and Joan", commencing 'Dear Chloe, whilst thus beyond measure". I don't have any copy of it.

Anybody?
-Joe Offer-