This was written by Graeme Miles in 1963 and is printed in a book entitled 'Forgotten Songs Remembered', edited by Graeme with Sam Dodds and Ed Lawrence, and published by Folk Leads in 2007. Whether it's still available I don't know. The words as printed differ a little from the above as follows:

Chorus
Well me name is William Stone
I'm a poacher that's well known
In all the years of committing such a sin
No gamekeeper 'as ever pulled me in
I was always a little bit smarter than 'im
An' they call me William Stone

Now when I was very very young
Me father said, "Now son
This poachin' lark is a very fine art
So tonight when it's dark we'll make a start
An' we'll take a little trip to Wynyard Park
An' I'll show yer 'ow it's done."

An' me father taught me well
All that there was to tell
'E showed me 'ow to set a snare
'E showed me 'ow to skin a hare
An' o' pheasants too there was a goodly share
An' 'e showed me where to sell.

One night when all was still
We climbed up Bottle Hill
On 'ands and knees we crept an' crawled
Down in the shadow of the high stone wall
We saw a few pheasants an' we took 'em all
An' our sacks wi' hares we filled.

But I'm not so nifty now
The years 'ave slowed me down
But I've passed it all on to Billy our lad
All that 'e knows 'e learnt from 'is dad
An' a better teacher 'e never could 'ave 'ad
It were me that showed 'im how.