Bank of a River
.Stand with your back to the source, and face to the sea or outlet: the left bank is on your left, and right bank on your right hand.
Sisters of the Bank, i.e. of the bankside, “the brothel quarter” of London. Now removed to a different quarter, and divided into “North” and “South.”
“On this side of the Banke was sometimes the bordello or stewes.”—Stow: Survey.