James Chambers married Mary Ann Fulton on 16.10.1855, registered Coleraine. You can view the original certificate on-line on the GRONI website, using the “search registrations” option:
You will need to open an account and buy some credits. It costs £2.50 (sterling) to a view a certificate.
Mary Anne & Martha in 1901:
Possibly Thomas in 1901:
Could be Samuel in 1901: