Regrettably, on listening harder to "Les Fraises," it's similar but really not that close, and the feeling is altogether different.

Just try singing the words to "Fraises" to the "I Don't Reckon" tune, and you'll see what I mean. Different tempo, rhythm, and the melody diverges by the end of the first line.

BTW, another later song that uses the tune and tempo is Ed McCurdy's 1950s "Portland County Jail." Also in the 50s, if I remember aright, Oscar Brand used it for his wonderfully goofy song about running booze into Canada which I think is called "Bootlegger's Song."

But I think we need to look further, and most of all, further back.

Bob