St Peter’s Port arch stones

St Peter’s Port was the water gate to the south harbour of the west town. The keystone includes a medieval head. The haunch stones carry the curious couplet: ‘O may not Satan’s agents enter/Will O’Wisp and Jack the Printer’.
A local man named Booth was responsible for the inscription, which arose from a property dispute he had in Athlone with William Sproule, a local merchant and John Potts, a colourful newspaper proprietor, who died in 1795 following a horse-whipping in Dublin by a rival journalist.