I've been singing this song for decades learned, I seem to remember from the Topic LP compilation of Flanaghan Brothers 78s. As far as I remember ( I no longer have the LP) I learned the words directly from the record but I have an extra last verse to what was given above by Jim Dixon on 01 May 05 - 09:40 PM which goes:-

Molly dear, oh! have you heard ahat all the neighbours say,
About those hundred sovereigns you have safely stowed away?
They say that's why I love you, dear, but Molly, that's a shame.
If you had only ninety-nine, I'd love you just the same.