Hi Suttontrust,
My Grandmother, Beatrice Minnie Harmer, (1906-1976) was always on about the White Slave Trade! She maintained that lots of girls were offered a puff of a "funny" cigarette in Lewisham, passed out...& woke up in Eastambul!!
Who knows if it really happened! (I suspect that she probably read about it in "The News of the World".
Romilly.