South out of Leadenhall Street between Nos. 65 and 65a (P.O. Directory). In Aldgate Ward, extending to Fenchurch Street.
First mention: "Harthorne alley" (S. 140). "Hartshorn Court" (Horwood, 1799-Elmes, 1831).
Other names : "Angel Alley," "Angell Alley" (Ryther's map, 1608-Boyle, 1799).
Name derived from the sign.
A Dictionary of London. Henry A Harben. 1918.