“Addiction, mainly in the upper classes, was viewed with sympathy. It was not a criminal offense to buy or sell morphine. Freud for a time prescribed cocaine to some of his excitable patients, and we know that Sherlock Holmes, when he was bored, injected himself with a 7% solution. Soon after their accession, the tzar and tsarina in St. Petersburg were taking a mixture of marijuana and hyoscine by way of relief from official cares…”

— Jacques Barzun, From Dawn to Decadence, p. 629