I sang in a group in the late 60s / early 70s and we were once lucky enough to be support for Tom Paxton -- whose music we already knew -- at a concert in Hamilton Town Hall (near Glasgow, Scotland).
We stayed in the wings to hear his set, and he sang 'Cindy's Crying', which I think he introduced as a new song. I thought it was an absolute knock-out and said so to him afterwards, wondering if I could have the words.
Anyway, he took a note of my address and I forgot about it -- until a copy of the sheet music arrived in the post a couple of weeks later!

Such a kindness from such a genuine chap -- and a great song too, saying so much in such a little space.