Mr. Ron Gosney's Response

I am going to see if I can turn something up for you, but as a starter I have to say don't believe everything you see recorded in one census return as I feel sure this is where you have got some of your information.
Take a look at James Betchetti and Charlotte Purdy, neither of them were born in Knottingley. As a glassblower James moved around wherever work was available in the glass manufacturing places of Yorkshire.
In 1881 census he is recorded as James BETCHELLS, a  27 year old glassblower lodging at Booth Fold, Conisbro and his place of birth is shown as YORK.  In the same census at Cromack Lane, Conisbro is a Charlotte PURDY aged 18 with what looks like a daughter Ann Maria aged 5mths, and Charlotte's place of birth is shown as Summercoats, Derbys.
So you need to check PRO indexes for a marriage sometime after 1881.

Kindest Regards 
Ron Gosney
13 November 2004