York was given a grant of murage dated 7/11/1391.
This was in the form of:-
Wording 
Grant to the mayor, bailiffs and citizens of York of murage for five years.
Granted by Richard II. (Regnal year 15). Granted at Westminster.
Primary Sources 
Maxwell Lyte, H.C. (ed), 1902, 
Calendar of Patent Rolls Richard II (1389-92) Vol. 4 p. 497 
online copy
Secondary Sources 
Coulson, Charles, 2009, Murage Grants (Handwritten list and notes)
     
Record created by Philip Davis. This record created 18/01/2009. Last updated on 03/05/2012. First published online 5/01/2013.