[4] Arthur O'Neill in his memoirs gives the following interesting account of Mongan and his family: "In my travels I became acquainted with a Dominic Mungan, I may say I had known him since I was twelve years old.
Mark was educated for a priest, and finished his studies in France, in the College of Lombard, where he obtained upwards of forty premiums for his translations of Greek into French.
He and a priest O'Beirne, who was Chaplain to Lord Fitzwilliam when Lord-Lieutenant of Ireland, were promoted to their present ranks of Protestant Bishops.
He in his lifetime used to travel the north-west circuit with his harp, and at one time, as he was playing for one of the Judges, he asked Dominic his reasons for not speaking to his son, the doctor, since he turned Protestant.
'My Lord' says Dominic, 'I spared no expense on him when he was unable to provide for himself; and assure your Lordship, I am no bigot; but I think it was his duty to consult me before he changed his religion.