this is the version I have;

O Sullivan's John to the road you've gone
    far away from your native home.
You've gone with the tinker's daughter
    for along the road to roam.
O Sullivan's John you won't stick it long
    'till your belly will soon get slack.
Up along the old road, with a mighty load.
    and your toolbox on your back.

There's an old Jill from oer the hill
    with her babe to her back strapped on.
She has an oul ash plant in her hand
    for to drive her oul donkey along.
Enquiring in every public house on the way
    as along the road she passed,
Is there anyone here to stand me a beer,
    and some where to rest me ass.

There's a old horse fair in County Clare
    in a place they call Spancil Hill.
Where my brother James got a rap of a hames,
    and poor Paddy they tried to kill,
They loaded him up in an oul ass and cart,
    as along the road to go.
Oh good luck to the day that he roved away
    for to join with the tinkers crew.