A Thomas Conroy was baptised on 21 December 1826 in County Clare. He was a son of John Conroy and Mary Waters of the townland of Killeen. The sponors to the baptism were Pat and Mary Conroy. Other children were born and the family subsequently moved from Killeen to Glanquin, Co.Clare. Thomas would have been about 24 when your Thomas emigrated to Baltimore in 1850. This is about the age that a young married man and his wife would emigrate from Ireland. You might contact the Clare Heritage Centre,Corrofin, to see if these Thomas Conroys are related,or are indeed the same person. Good luck.