Akademik

Three Leg Alley
   1) West out of Bishopsgate Street, in Bishopsgate Ward Without, near Bethlem Churchyard (Strype, ed. 1720, I. ii. 108).
   The site is now occupied by Liverpool Street Station and the Great Eastern Railway lines.
   Name derived from the sign, which represents the Manx arms, and is also the emblem of Sicily.
   2) East out of Fetter Lane to West Harding Street, and east again, in Farringdon Ward Without, 1641 (L. and P. Chas. I. XXIII. p.633, to Boyle, 1799).
   It is also called "Red Lion Passage" from "a paltry Inn there which bears that sign," with a thoroughfare on suffrance through the house of Samuel Francome at the sign of the Horseshoe in West Harding Street (W. Stow, 1722).
   See Trinity Church Passage.

A Dictionary of London. . 1918.