Swansea Mohawks

Yn y nos, cyn sefydlu heddlu rheolaidd yn Abertawe, byddai saith o wylwyr oedrannus, neu 'charleys', yn patrolio strydoedd pylu'r dref, targed delfrydol i dwyllwyr treisgar. Pam roedd y 'Mohawks' hyn i bob golwg uwchlaw'r gyfraith?
At night, before the establishment of a regular police force in Swansea, the dimly-lit streets of the town were patrolled by seven elderly watchmen, or 'charleys', an ideal target for violent pranksters. Why were these 'Mohawks' seemingly above the law?