Today, hot on the heels of a tip from Geralyn Barry, I looked up The Irish Genealogist, Volume 4, Number 6, November, 1973, and read "The Popish Inhabitants of the Half Barony of Ikerrin in 1750", pp 578-583 inclusive. This was a census of the Catholics who owned land in that barony of County Tipperary. I believe the purpose of the census was to identify Catholic landowners and tax them for whatever monetary losses had been suffered by English interests or by loyalist (maybe that is an anachronism, but it may get the idea across) inhabitants of the barony. There was to be one farthing of tax levied per 3 acres of land, I think. I wish I had been able to copy more info, but the library was about to close, and they didn't have a copier. One of the persons to be taxed in the Parish was John CURRAWN, who owned 1 acre. I don't know what tax had to be paid when the amount of land owned was less than 3 acres. I went through the census names two or three times before it occurred to me that this might be yet another variation on the spelling of the name Kirwin/Kirwan/Kerwin/etc., etc..