Many thanks for the comments
I have not been looking at baptisms whether adult, Baptist or CofE.
This is the Register of Births I have mentioned (on Ancestry; Findmypast have the same).
https://www.ancestry.co.uk/imageviewer/collections/2972/images/40612_B0150269-00005?ssrc=&backlabel=ReturnFS film number 0825422 covers 9 chapels from the RG4 series, including this Wivelsfield register of births.
Amondg – do you have a link to that transcription on Ancestry? Or is it just the individual entries in “England, Select Births & Christenings, 1538-1975”?
I had a look at Sussex FHG’s data archive for the Chapel. Their transcription has the missing Knights, plus 3 Normans – 12 entries or 3 pages all “baptised” (should be “registered”) on 14 April 1790. These would fit in before the first image, page 5. Confusingly, they appear to have nothing transcribed after page 20 of the Ancestry/FindMyPast images.
Either there a duplicate register (with more entries) or the scans on Ancestry/FindMyPast are missing pages.
I would prefer to see the actual images but the transcriptions seem to be sound. I don’t think it warrants a trip to Kew to see the original!
An interesting diversion.