Patrick McCormick bought the townland of Cartronroe, parish of Tuam, barony of Dunmore, county Galway, from the sale of William Burke's Bermingham estate in 1850. In August 1856 he bought the nearby townland of Monacow in the same parish from William R.B. McGuire. Monacow was advertised for sale in February 1865. It was sold to Nicholas Browne of Tuam for over £1500. In the 1870s Patrick McCormack of Ardkill, Hollymount, county Mayo, owned 800 acres in county Galway and 431 acres in county Mayo.
National Archives of Ireland:
Landed Estates' Court Rentals (O'Brien), McCormick, 10 Feb 1865, Vol 75, MRGS 39/037, (microfilm copy in NUIG)