A further instance of "Jericho"

[1780] “April 26: Busy in painting some boarding in my Wall Garden which was put up to prevent people in the Kitchen seeing those who had occasion to go to Jericho.”
The Reverend James Woodforde. From “Diary of a Country Parson” vol. I: 1758-1781. Ed. John Beresford. Oxford University Press 1981. ISBN 0-19-811485-0

Maybe this meaning of “Jericho” should be included in the entry. Although it is already listed as “a figurative place of retirement”, the direct application to a privy is new.