I am really at a standstill on my research for information on Oliver Gleason and have been for some time now. Oliver Gleason married Sarah Unger.The children that I know of are;Leonard b. 1827 married Caroline Hallock, Mary Gleason b.1832 NY and married James Hallock, David, b, 1842 in Canada, Sophia b. Canada, Oliver b. 1844 Canada, Mihitable b. Canada.From the biography of James Hallock, I learned that Oliver died abt 1850 in Ontario about 25 miles from Toronto. If anyone else is researching this family, please contact me.