Líon alt a bhfuil an ghné seo luaite iontu: 2
Deir Theophilus féin san ionsaí a rinne sé ar Mhacpherson: ‘The assertor of this is eight and forty years old [in 1808]: and at the age of twelve he could read and enjoy the beauties of all the poems attributed to Oisín; all the tales of the Finnian heroes; Clann Touran; Clann Lir; and Clann Uisnigh; and could, with puerile indignation, ridicule the wily attempts of the Scots of Alba to make the reputed poems of Oisin their own’ (Transactions of Gaelic Society)
Bhí baint mhór aige i 1971 le tús a chur leis an malartú d’fhilí Gaeilge idir Éire agus Alba. I 1974 ghnóthaigh sé Ph.D