1973, HNS from O'Callaghan, Tommie / to Charlaine Hays, 'Permission to see […] from Fr. Barnabas - last letter «qualified» - I have reg.'

Thomasine ("Tommie") O'Callaghan was a close friend of Merton's through much of the 1960's. They met through a mutual friend and former professor, Daniel Walsh, whom Merton knew from a graduate course at Columbia University and O'Callaghan knew through the College of the Sacred Heart at Manhattanville, Purchase, New York. Merton became an adopted part of the O'Callaghan family in Louisville, getting to know Tommie's husband Frank and becoming "Uncle Louie" to the seven O'Callaghan children. Sometime Merton would visit the O'Callaghan's in conjunction with doctor's visits in Louisville. Tommie O'Callaghan also planned some picnics for Merton at Gethsemani. Merton chose her as a local member of the trustees of his literary estate in addition to the others from the publishing world in the northeast, Naomi Burton Stone and James Laughlin. (Source: The Thomas Merton Encyclopedia, pp. 340-341.)