From The Arthur Conan Doyle Encyclopedia
John Lennon (9 october 1940 - 8 december 1980), better known as one of the creator of the Beatles, was a singer and writer who wrote a sherlockian parodic pastiche titled The Singularge Experience of Miss Anne Duffield involving Shamrock Womlbs and his sidekick Whopper. He explained how came the idea of writing this story :
« I was writing The Singularge Experience of Miss Anne Duffield, the Sherlock Holmes piece; it was the longest one I'd ever done. I was seeing how far I could go. I would have gone on and on and made a whole book out of it, but I couldn't. I read one or two Conan Doyle books when I was younger, but on the boat that we'd hired there was a set of them. There was nothing else on the boat but books, half of them were in French and half of them in English. Tahiti and all those islands - great, but I still got into reading. I read every book that was in English whether I liked it or not; through boredom, really. There just happened to be a big volume of Sherlock Holmes, a sort of madman's Sherlock Holmes where you get all the stories in one; and I realised that every story was the same. They're all pretty similar; and that's what I was doing, writing all of them into one. So I wrote one Shamrock Womlbs after three weeks of Sherlock Holmes in Tahiti. »
He also liked to dress as Sherlock Holmes as you can see on the photos below:
Screenshot of John Lennon's clip of "(Just Like) Starting Over" (October 1980).