I don't know if Thomas Bartley had any siblings. I just assumed that he was not the oldest son since he immigrated to USA & was a tailor in NY. I'm not sure if that was his occupation in Ireland or he learned the trade in NY. The only other thing that I know is a story that his son, my Grandfather, Thomas Joseph Bartley (1882-1972) told me. When he was 5-years old his father, Thomas Bartley, took Thomas Joseph & his older brother, John Aloysius to Granard to visit the grandparents. He said that his grandparents lived in a big stone house near a river & there was a suit of armor inside. Thomas Joseph celebrated his 6th birthday - 3/12/1888 - in Ireland & he missed the Blizzard of '88 back in NY. He also said that his grandparents wanted to keep him in Ireland, but obviously they didn't.
I have checked the Griffiths Valuation very briefly, but I'll try again. Thank you for your quick reply & tips on research. Mary Bartley Ward