Sorry I misled you, on two counts, the church and the dates of Joseph Jellett.
I am not sufficiently local to know that there is another church at Westhampnet, but I have now found it on a map. The church to which I referred is that at Port Field, which is now apparently a museum of musical automata. The graves there go back to the mid eighteen hundreds.
Joseph Jellett was not early eighteen hundreds, as I previously stated, he was born in 1858.
I am currently researching another "arm" of the family; I may contact you again when I get back to the Jelletts, as Joseph is currently my earliest.