‘Demurrage’ is the compensation due to a shipowner from a freighter for unduly decaying his vessel in port beyond the time specified in the charter-party or bill of lading. It is in fact an extended freight. A ship, unjustly detained as a prize is entitled to ‘demurrage.’
— Smyth’s Sailor’s Word-Book, 1867.
This text comes from a footnote on a diary entry in the 1893 edition edited by Henry B. Wheatley.