Sherlock Holmes is a fictional character indelibly linked with London - he lived in Baker Street, and subsequently the vast majority of the crimes the character deals with are either within the centre of London, or the surrounding environs which would eventually become part of London. Many of these suburbs are now relatively central parts of South London, and we will discuss most of them in later articles, but in this one we are going to discuss Sherlock Holmes activities in a consistently central part of South London - Lambeth.