Comprises rentals containing lists of tenants, the denominations of their holdings and the rents paid by each, with total amounts of income from each of the estates in County Sligo and the City of Dublin between the eighteenth and twentieth centuries. There are two groups of rentals, loose sheets (mostly the earlier rentals) and bound volumes (mostly from the nineteenth century onwards). The volumes and loose sheets are listed chronologically. The rentals are divided into those relating to the O’Hara estate generally, those relating to the County Sligo estate and those relating to the City of Dublin estate.