In John's obituary, it states he came to Newport in 1848 and that Susan is "of Newport". At their marriage, the bride and groom state their residence as Newport and Pillgwenlly (the neighbouring town to Newport).
Susan has been found in the 1851 UK Census - a servant with Elliott family at 41 Commercial Street, Newport, Wales. Witnesses at wedding are living at same address.
John has not been found in the 1851 UK Census.
7 Nov 1836 Thomas Chambers of Newport married Mary Dark of Newport - Banns Witnesses: John Tamplin?; Wm. Jenkins 14 Sep 1857 Wm. Dark, of Full Age, Batchelor, occupation labourer, of the parish of St. Woolos, father James Dark labourer, married Anne Lewis, of Full Age, Spinster, of the parish of St. Woolos, father John Lewis shipwright. -Banns Witnesses: Wm. Manning, Ann Howells