Here's another relevant comment from Gurney, copied from the other thread:

Well, I have been guilty of exactly what this thread is about, asking for lyrics, getting them, and not thanking the poster. I know I've done it at least once, and I was so delighted to find the song after so long, I got the guitar out...and forgot to say thanks...and by the time I remembered, the thread had fallen way off the bottom and I couldn't remember the title, and didn't know how to get it back.

I apologised on another thread later, but the likelihood of the poster actually seeing the apology is remote.