On Grays I have just this tiny bit:
Mr. Gray married Margaret (b. 1826, died 27 August 1898 at Longfield, Co. Monaghan).
Mr. Gray and Margaret had Mary Jane Gray (I have that she too die din 1898, so perhaps only one of them died on this date.) Mary Jane Gray married George Harrison (1856-1887) of Drumakill, Co. Monaghan. George was the son of Hugh Harrison (died about 1859) and his second wife, Anne Hale.