I checked on the film of the official copy - the marriage was indeed in 1851 - however the handwriting was such that the 1851 looked sufficiently like 1857 that the IGI transcription is incorrect for all bar one of the 1851 marriages(ie 8 out of 9 are incorrect) - the Kewley McClure is number 18 on the new post 1847 register - james Kewley 24 shoemaker father william papermaker;ann McClure 24 father wm mcclure weaver witnesses robert curphey;james mcclure