On the Forest of Dean records (you can search for witness) - but there is a family link with this marriage (as Thomas HEBERT, and Elizabeth WILTON, who later married, are both witnesses at this wedding..... by Licence, haven't checked this yet as this could be on the FOD records)...
12 November 1843
Cornelius HERBERT - Brewer, Redbrook, father Thomas HEBERT, farmer
Jane WILTON - father: William WILTON, Tin Plate Roller,
by Licence.
witnesses: Thomas HERBERT and Elizabeth WILTON