Teermore, Roscommon ownership records

I have been trying to trace my Gannon roots and have found a few articles on find my past, related to various deaths and auctioning of land.  Is there an easy way to trace the land ownership or lease into the past?  I believe there are at least 3 brothers that leased the land and the two neighboring tow lands of Caranlea, and Carowntogher.  Timothy (Thady), Gilbert and James Gannon.  The tithe record shows and Edmond Gannon at Teermore, but that is the only mention of him that I have found.  I was hoping the land ownership and leasing information would point to an ancestor and possibly the last descendant in the area.  Any help is appreciated.