The song is THE SILVER DARLIN'S, written by Brian McNeill and Dougie Pincock (members of the Battlefield Band) and recorded by The Battlefield Band with Alison Kinnard; also by The Browne Sisters & George Cavanaugh, Anna Massie, Alastair McDonald, and The Wickford Express.

The first line is—

"Between the beggar's mantle and the Lights o' Peterhead"

And the lines that Okiemockbird was trying to quote are—

"So dinna blame the fisher folk for taking to the oil,
For if they couldna find the fish, they'd nothing for their toil"

The complete lyrics have been posted at Mudcat here and here.