Some articles on portmanmoot:

Leicester City Council - History
... before then to the Merchant Gild and the Portmanmoot ... The Portmanmoot consisted of 24 Jurats, elected from the burgesses (members of the Gild Merchant, or freemen), along with two bailiffs, and a clerk ... In 1209, the lead member of the Portmanmoot, the Alderman, became known as a mayor ...