In 1855 the trustees of the Alliance Insurance Society held an estate of 9 townlands in the parishes of Rahoon and Oranmore, barony of Galway and in the parish of Claregalway, barony of Clare, county Galway, all formerly belonging to Lord Oranmore and Browne. In the 1870s the Society owned 282 acres in county Galway and 573 acres in the county of the town of Galway.
National Archives of Ireland:
Five rentals of the estate of the trustees of the Alliance Assurance Company, in the barony of Clare and parish of Rahoon in the county of the town of Galway, 1860s. M. 5375
National Library of Ireland:
Westport Estate Papers, Collection List 78. MS 40,966 documents the mortgage held by the Alliance Insurance Company on the estates of Lord Oranmore and Browne