Sentence:  In the course of these last few months of active <WSD>costermongery</WSD>, of transactions in early peas and new potatoes, spring-cabbage and ripe strawberries, he had acquired not only an insight into commerce but apparently an intimate knowledge of every street in London, and a very fair acquaintance with its celebrities; 
Meaning of the word marked with <WSD> tags:  The business of a costermonger; the process of selling frutis and vegetables from a cart or barrow.