I have figured out who Thomas Lennox was, who died in 1874. He was born in Co. Tyrone, Ireland abt 1817 as per all the censuses in Co. Durham but his death record has his birth as about 1802. Thomas married Mary Ann Lennox, nee Lennox, born Scotland, Apr 3, 1859 in Gateshead, unverified. They had Rebecca 1860, Andrew 1862, Eleanor abt 1865, and Mary Ann abt 1867. Son Andrew died Apr 1891.
Doesn't help with the Thomas that I was looking for.