n. a person who investigates
adj. cunning or crafty
n. a drinking companion
In “The Adventure of the Abbey Grange,” a bottle of wine is two-thirds full and then half empty, without explanation.
In The New Annotated Sherlock Holmes, Leslie S. Klinger writes, “Perhaps Holmes poured some wine off to conduct an actual experiment, instead of simply imagining the result.” Or perhaps Holmes and Watson drank it themselves.