Records deriving from administration of the estates of William Gore, Owen Ormsby, Mary Jane and William Ormsby-Gore in the counties of Westmeath, Leitrim, Sligo, Mayo and Roscommon. They comprise rentals, 1775-1858, accounts, 1789-1859, and correspondence, 1793-1887; and they constitute a good source of information on the impoverished state of Irish agriculture, land reclamation through drainage, other attempted improvements and the effects of the Potato Famine.