MtheGM has it right.... as a Devonshire lad... brought up with that song as part of our heritage..... that is as the 'original' Devonshire version....
The Lyrics:-
Tom Pearse, Tom Pearse, lend me your grey mare,
All along, down along, out along, lee,
For I want for to go to Widecombe Fair,
With Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all.

And when shall I see again my grey mare?
All along, down along, out along, lee,
By Friday soon, or Saturday noon,
With Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all."

Then Friday came, and Saturday noon,
All along, down along, out along, lee,
But Tom Pearces old mare hath not trotted home,
With Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all."

So Tom Pearse he got up to the top o' the hill
All along, down along, out along, lee,
And he seed his old mare down a-making her will,
With Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all."

So Tom Pearse's old mare, her took sick and died,
All along, down along, out along, lee,
And Tom he sat down on a stone, and he cried
With Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all."

But this isn't the end o' this shocking affair,
All along, down along, out along, lee,
Nor, though they be dead, of the horrid career
Of Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all."

When the wind whistles cold on the moor of a night
All along, down along, out along, lee,
Tom Pearse's old mare doth appear gashly white,
With Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all."

And all the long night he heard skirling and groans,
All along, down along, out along, lee,
From Tom Pearce's old mare in her rattling bones,
With Bill Brewer, Jan Stewer, Peter Gurney,
Peter Davy, Dan'l Whiddon, Harry Hawke,
Old Uncle Tom Cobley and all,
Old Uncle Tom Cobley and all."