⁴The Castletown River today is now navigable to to public docks, downriver from theTáin Bridge. But it is likely that the river was less silted earlier, as Saltown, 2 miles upstream, was where "Pirate Byrne" had his dock.]

According to this source, “It was also an important meeting point for feasting and the formation of alliances as when Brian Boru met with the King of Ulster.”