Hi Rod,
James & Mary Rumley are entered twice in 1841, one page crossed out, giving both as details slightly different
1841 HO107/482/2 Folio 53 Page 68
Brickfield Cottages, Dartford, Kent
James Rumley 60 Marine Dealer Y (b. Kent)
Mary " 50 N (not b. Kent)
1841 HO107/482/2 Folio 36 Page 30 (whole page crossed out)
Dartford, Kent
James Rumley 62 Marine Store Dealer Y
Mary " 54 N
No sign of them in 1851, possible death registrations:
Dec 1848 Dartford 5 69 RUMLEY Mary Ann
Sep 1850 Dartford 5 55 RUMLEY James
Hope this helps,
Barbara