I don't remember the first time Horton's song popped into my mind. The words have varied some, and have grown more affirming as he's made steady progress. The tune is Reuben and Rechel; the current version is something like “Horton, Horton, I've been thinking what a fine boy you will be, when all the balkiness has left to far beyond the deep, blue sea.” (BTW, I think he likes being serenaded!)
Recently an unexpected opportunity presented itself; total serendipity. Final details are still being worked out; if/when they are, I will tell the entire tale. For now I will just share the soundtrack.