Roy Hudd, "A Fart in a Colander" (2009)[ref. to WW2]:

“[My grandmother] would tell me stories of when she was a girl and, best of all, sing and teach me the songs of her childhood. Of course they were mostly music hall songs. Other kids had cheesy pop songs to send them to sleep, but I had ‘The Hole in the Elephant’s Bottom.’ About forty years later I recorded it on an LP (oops, CD now) - and it was that song that sold more copies of the record than anything else. And still does.”

Anthony Powell, Messengers of Day (1978) [ref. to ca1928]:

“He had been kept awake until a late hour by Varda’s friends carousing in her sitting-room, especially by prolonged singing of ‘The Hole in the Elephant’s Bottom.’”

Pte. Joe Yarwood (1896-1995), 94th Field Ambulance, RAMC, in Richard Van Emden, ed., Britain’s Last Tommies (2005), [ref. to 1916]:

“In comes the Colonel and all the officers, and they’d had a couple too, and one of them, and this was unpardonable according to army rules, he was telling dirty stories, if you please. I can remember him singing a lewd song, ‘I’ve [sic] a hole in an elephant’s bottom.’ This went on for about half an hour until the officers had had enough.”