What is most amusing about that letter is that it is the foreword for a song book called Jumpin' Jims 60s Uke-In compiled by Jim Beloff of Fleamarket Music, who has the FMM website which has one of the original ukulele bulletin boards dating from the late 1990s and is still going. The letter has been cut and pasted a lot but none of the hip cool hipsters who post it seem to want to associate it with the book which has a lovely flower power cover, an interesting name, and was compiled by Jim Beloff who is one of the people behind Fleas and Flukes. Of course the book also has a number of Beatles tunes arranged for ukulele and Harrison's great tunes. I often wonder when I see a thing like this whether Jim has been too successful for the liking of some people. But of course the letter is a Relic, a wonderful memory of a great musician who loved his ukuleles as well as being the foreword for a songbook.
If you search on "Jim Beloff George Harrison" you can probably find the story behind the letter, it is there somewhere.