No. 665: Field Street, WC1
Field Street, London, WC1. Photo © Roger Dean 2012
Ins and Outs of London – W. O’Daniel, 1859:
The houses of London are supplied with knockers, and very few with bells. The postman comes only with two loud and sharp knocks. The newsman knocks only once, and very loud. Servants knock once and quite low. Visitors three or four times in rapid succession. The police and duns are allowed to knock in any manner at all that will secure admission.