The Sign of the Four, initially titled justThe Sign of Four, is the second ofDoyle’snovels to feature the analytical detectiveSherlock Holmesand his faithful companion and chroniclerDr.Watson. The action takes place not long after the events inA Study in Scarlet, the first Holmes novel, and that prior case is referred to frequently at the beginning of this one.
Holmes is consulted by a young woman about a strange communication she has received....