The following variant text is from the Scottish Students' Song Book, circa 1890 methinks.

1. St. Patrick was a gentleman, he came of dacent people,
In Dublin town, he built a church, and upon it put a steeple;
His father was a Callaghan, his mother was a Brady,
His aunt was an O'Shaughnessy, and his uncle was a Grady.

CHORUS: Then success to bold St. Patrick's fist;
He was a saint so clever;
He gave the snakes and toads a twist,
And banished them for ever.

2. There's not a mile in Ireland's isle, where the dirty vermin musters,
Where'er he put his dear forefoot, he murdered them in clusters.
The toads went hop, the frogs went plop, slap dash into the water;
And the beasts committed suicide, to save themselves from slaughter. [Cho.]

3. Nine hundred thousand vipers blue, he charm'd with sweet discourses,
And dined on them at Killaloo, in soups and second courses;
When blind worms crawling on the grass disgusted all the nation,
He gave them a rise and open'd their eyes to a sense of their situation. [Cho.]

4, The Wicklow hills are very high and so's the hill of Howth, sir;
But there's a hill much higher still, ay! higher than them both, sir!
'Twas on the top of this high hill St. Patrick preach'd the sarment,
He drove the frogs into the bogs, and bother'd all the varment. [Cho.]