Ulster is a province not a place. Ireland was divided into 4 provinces.
The province of Ulster consisted of these counties:
Antrim, Armagh, Cavan, Derry, Donegal, Down, Fermanagh, Monaghan and Tyrone.
Tithe Applotments:
www.genealogy.nationalarchives.ie No Sellards or Brevard's
Wiley:
Thomas Wiley, Parish Kilmore, Townland Bannaghbane, Co. Monaghan
Thomas Wiley, Parish Castletownkindalen, Townland Ballykilroe Ballyconnell, Co. Westmeath
Thomas Wiley, Parish Kilkenny West, Townlands Waterstown & Carrickfin, Co. Westmeath
Griffith Valuation 1845-1864:
www.askaboutireland.ieNo Brevard or Sellard
Wiley's 405, includes any tenants they may have. Antrim 157; Armagh 27; Cavan 1; Clare 1; Cork 5;
Donegal 5, Down 16; Dublin 11; Kings/Offaly 1; Londonderry 21; Meath 34, Monaghan 19.
Depending on when Thomas left Ireland:
Thomas Wiley's; 3 Co. Antrim; 6 Armagh; Donegal 2; Londonderry 3; Monaghan 2; Tyrone 2; Westmeath 1;
www.rootsireland.ie has parish records, however, survival rates depends on the parish. Note your dates very early for parish record survival.
www.igp-web.com+ county
Naturalization papers might give the county he came from.
Annette Code