1) West out of Aldersgate Street, at No. 157, to Bartholomew close, eastern end in Aldersgate Ward, western in Farringdon Ward Without (P.O. Directory).
First mention: O.S. 1875.
Former names : "Half Moon Alley," "Half Moon Court" (Hatton, 1708-Elmes 1831).
A tavern stood there in the 18th century.
2) East out of Gracechurch Street, leading into Leadenhall Market. In Lime Street Ward and Bishopsgate Ward Within (O.S. 1848-51-O.S. 1880).
It is shown in O. and M. 1677 and the later maps as a passage into the market, but unnamed.
The Passage was removed for the erection of the new Market, but Half Moon Tavern at No. 88 still marks the site.
A Dictionary of London. Henry A Harben. 1918.