Here's the answer I got from Susie Malcolm, who sings this song wonderfully:

Dear Joe,



I checked on the MCPS website and I found this info:



Pittenmweem Jo

MCPS Tune code: 0164993C

Composer/Author John Leslie Watt

Publisher: Neon Music



When Jim and I use someone else’s song on a recording we get a license from MCPS and pay royalties to them, which are then forwarded to the copyright holders minus MCPS’s commission. I don’t know what the process is in the US.

I hope that’s of some help.

We knew John Watt – he was a really nice person, always very ready to laugh. He wrote some great songs and we sing a couple of them quite often. The last time we saw him we joined him on an old wooden bench he was sitting on. It collapsed under our combined weight and we all rolled about on the grass laughing. It’s a very happy memory.

All the best,
Susie

But as Ewan McVicar says, the USA does not have a reciprocal arrangement with MPCS, which makes it difficult.

-Joe-