1) East out of St. Martin le Grand, at No. 50, to George Street, in Alders-gate Ward (Lockie, 1816).
First mention: A court of St. Martin le Grand, called "le Deanes Court," 34 H. VIII. (L. and P. H. VIII. XVII. 393).
Strype says it comprised two courts," Great Deans Court" and "Little Deans Court" (ed. 1720, I. iii. 121).
So named from the Dean of St. Martin's le Grand.
Site afterwards occupied by the old General Post Office.
2) West out of Old Bailey, at No. 25, in Farringdon Ward Without (P.O. Directory).
First mention: O. and M. 1677.
3) North out of Carter Lane, at No. 26, to No. 5 S. Paul's Churchyard (P.O. Directory). In Castle Baynard Ward.
First mention: "Deane's Yard" (Leake, 1666).
Other name : "Prerogative Court" (O. and M. 1677).
So named from the Prerogative Office kept there, and Dean's Court from the Deanery, erected on its present site after the Fire.
At No. 5 is the Vicar-General's, Commissary and Consistory Court, etc., relics of Doctors' Commons.
A Dictionary of London. Henry A Harben. 1918.