And from a post in the first blicky, by a fellow named Ormonde Waters:

If it's the song that starts "I speak with wonder, one night in slumber, my thoughts did wander near to Athlone. The centre station of this Irish nation, a congregation unto me was shown..." It was written around 1798 by James Porter who was a dissenting clergyman from Greyabbey in Co. Down (and incidentally my maternal great-great-great-great-great grandfather - there might be an extra great in there - I never can remember). He was hanged in 1798 basically for writing satire against Lord Londonderry. In one of bizarre twists of life, after he been hanged for standing up for human rights, two of his sons subsequently emigrated to the states where at least one of them ended up owning a plantation which was worked by slave labour.