Hi Jay,
Just back from a sweltering Guisborough, sadly not much to report, couldn't find any of the four graves you listed. Lots of the old stones seem to have gone, grass well mown all over! Some old ones badly worn, maybe as you said, there wasn't a headstone to find.
I did find one Atkinson grave in section A, and a Wilson grave in II, so have taken pics and will email them to you
The Atkinson one reads:
In loving memory of my dear mother Annie M. Atkinson died Nov 25th 1873 and the urn next to that stone has in loving memory and the names Jane Atkinson, William Atkinson and George Atkinson round the sides. No dates.
Barbara