 Sister Mona and her fellow sisters and priests remained at their posts as long as they could until they were arrested and imprisoned, along with their Bishop, Dr. J. Whelan, C.S.Sp.They were reportedly released only through the personal intercession of Pope Paul VI and then deported from Nigeria.The remainder of her missionary life was spent in Zambia, where she worked firstly in Monze Mission Hospital, and later in Lusaka University Teaching Hospital (UTH), after a brief year in the Westminster Pastoral Institute in London.