Gibb,
Have copies of Chappell if you need it, including his own personal copy.

Paddy Works. There is no broadside as such. There are broadsides possibly related with this title and similar c1850 all mentioning Greenock in Scotland. There is useful info on it in Folk Songs of the Catskills where they mention a sheet music copy seemingly written by J. B. Geoghegan in the Levy Collection. It mentions tunewise the connections to 'When Johnny Comes Marching Home' which is also claimed by Geoghegan. 'Paddy works on the Erie' about canal building may be older. When was the Erie Canal built?

I'm pretty certain it must be an American song of Irish navvies inspired perhaps by the Scottish song.