I remember a Dover edition of turn-of-the-century songs which included the sheet music to "I Don't Want to Play..."

"Over the garden wall" reminds me of the 19th century parlor song of that name (scan available at the Levy collection, I believe) which the Carter Family recorded - simplified and abbreviated, of course, so that it turned out fairly drab and didn't make much sense as a story. In its original form, though, it's a cute song, with clever internal rhymes.