You may also want to track down the TG4 documentary Cerbh É Tommy Potts ? in which Paddy Glackin looks (as per the title) into who Tommy Potts was. Very much worth a look too.

The article 'Traditional Ears' : Perception and Analysis in Irish Traditional Music by Micheál Ó' Súilleabháin in 'Essays in honour of Tom Munnelly' (publ OAC, 2007) deals with Potts as well and is a good read.