Just so we know we're on the same page, so to speak:

Here is the web page for a duo from Wiltshire UK (Sophie Wright and John Anderson) who call themselves North South Collide. They also perform with Tim Graham, Christina Harden, and Sheila Kitts as Time and Tide.

There is a 30-second MP3 excerpt of QUIET WATERS on this page, but it contains only what seems to be a few introductory notes on guitars—no lyrics.

The song comes from a production and CD called "Salt upon the Shore."

Sorry, I couldn't find any lyrics.