there are 4 possible christneings that could belong to this John:
The earliest is John son of John Jenkinson Chr 2 aug 1674 at Skipton.
Next is John son of John Jenkinson and Catherine Scott at 14 Dec 1679 at Rylstone.
Thirdly there is John son of William Jenkinson Chr 6 Jul 1685 at Skipton.
Lastly, there is a John son of Thomas Jenkinson Chr 18 Jul 1686 at Rylstone.
I am not sure which one is the correct one, unless the names of Scott or Catherine crop up in the later generations. I think it is likely that his work is done though.
Just the one child showing pu on the IGI for this couple, in the parish of Harewood.
May be there were other children born in other parishes???