Transcriber’s Notes

Obvious typographical errors have been silently corrected. Variations in hyphenation and accents have been standardised but all other spelling and punctuation remains unchanged

The cover was created by the transcriber and is placed in the public domain.

Japanese smokers.

THE
SEVEN SISTERS
OF
SLEEP.

POPULAR HISTORY OF THE SEVEN PREVAILING
NARCOTICS OF THE WORLD.

BY
M. C. COOKE,
DIRECTOR OF THE METROPOLITAN SCHOLASTIC MUSEUM.

“‘How many are you, then?’ said I.
‘O Master, we are seven.’”
Wordsworth.