There are a number of children on IGI born to a John and Hannah Cox in Alfreton and Belper after 1792 - did they move there?
John married Hannah Doar, daughter of William Doar and Katherine Taylor, on 24 Nov 1788 in Sandiacre.1 2 (Hannah Doar was born on 22 Nov 1758 in Sandiacre 4 and was christened on 16 Dec 1758 in Sandiacre 5.)
1 Georgina Lyons, BT. Marriage of John Cox and Hannah Doar 24 Nov 1788. Assume same Hannah.
2 http://www.uk-genealogy.org.uk/england/Derbyshire/towns/s/Sandiacre/, p41.
3 Georgina Lyons, Marriage.
4 Georgina Lyons, BT.
5 Georgina Lyons, BT. Hannah daughter of William Door and Katherinnah b 22 Nov bap 16 Dec 1758.