Thank you Bookbox and Rhododendron for deciphering it for me.
I have just realised what all the dates correspond to...
They are the birth years of the children of Robert Minson
jnr born 1720, the son of the Robert Minson I was talking about! It was written in the Kingstone book twice, it was crossed out and then it was rewritten a few pages into the book (there are only 30 pages). Listed is my ancestor Sarah who was the last child born to Robert jnr and his wife, Mary, in 1758.
Now I'm really confused
I looked through the whole book and there are lots of doodles and column addition and the name Minson seems to pop up in strange places...
The note I attached in my previous post was at the beginning of the book (1716) when Robert jnr hadn't even been born. Is it possible he had something to do with the book at a later date and felt he could scribble notes wherever? Unfortunately, Robert jnr's will has been lost but his father was a yeoman - I don't think they would have been parish clerks or wardens. The boys in the family could write (at least their name) but the girls couldn't. Although, it is unusual for children to be listed together in a 'block,' usually the entries are in date order.
Queenie