THE PRINCE OF DARKNESS is sung by Ed Miller on his album "The Lowlander" (with instrumental backup by Brian McNeill).

You can hear a generous 2-minute sound sample at CD Baby, from which I transcribed this:

I was born in the village of Kilkenzie,
And my faither was an elder o' the kirk,
And the day I turned thirteen, he looked me in the een
And told me it was time I was in work;
For employment was a way to beat the devil,
And I must challenge him wherever he was found;
That if I wanted decent pay, there were five different ways:
North, south, east, west or down.

CHORUS: I used to battle wi' the Prince o' Darkness.
I used to steal away his heart through a four-foot seam.
And when they asked if I was poor, I'd tell them, "Aye, sure,"
But they never had to teach me how to dream.

Oh, the first time I went in, then I was shakin'.
I was just a laddie frightened o' the dark,
But wi' a cutter in my hands, I soon became a man.
I was surely never frightened o' the wark.
I learned to listen for the creakin' o' the timbers,
Tae watch the air aroond the candle flame,
And on ev'ry sweated ... (?) and you have many risks to run (?)
And that danger was a miner's middle name. CHORUS

[The Greenman Review has this interesting quote:]

"McNeill wrote the words after meeting an ex-miner, now working as a museum guide [at the Scottish Mining Museum in Newtongrange], whose stock answer to those tourists naively asking to which clan he belonged was that his clan were the miners."