Townland

Here is to be noted, that Sir Hugh got his estate by townlands, by reason of his agreement with Con O'Neil, whereas other undertakers of plantations in Ulster had several scopes of land (called proportions) admeasured to them, each containing one thousand acres, profitable for plough and good pasture, mountains and bog not reckoned in the number, but thrown in as an appurtenance.

Source: wiktionary

I am not aware that those tenants have since transgressed; but I received a letter from home, informing me that there were three fines struck upon a townland of mine, and that on the tenants of that townland being asked how that came about, the only account they gave was, that there were three stills brought from Cloghonnelly, and lodged in that townland of mine.

Source: wiktionary

The civil distribution of Ireland, in the descending scale, is into Provinces, Counties, Baronies, Parishes, and Townlands; and under these successive grades of classification every acre of Ireland is accounted for in that noble compilation, the Census of 1851,— […]

Source: wiktionary

[T]hey walked round the lake, for the townland was at the back of the demesne; and while they walked, James proposed to pay Mike ten shillings a week for his board and lodging.

Source: wiktionary