We first became interested in the opium traffic during a visit to the Far East in 1916. Like most Americans, we had vaguely heard of this trade, and had still vaguer recollections of a war between Great Britain and China, which took place about seventy-five years ago, known as the Opium War. From time to time we had heard of the opium trade as still flourishing in China, and then later came reports and assurances that it was all over, accompanied by newspaper pictures of bonfires of opium and opium pipes. Except for these occasional and incidental memories, we had neither knowledge of, nor interest in the subject.