Some matters of interest mainly to students of sleep phenomena have been mentioned in the text and put in these appendices. In this way the general reader is saved the trouble of skipping in the body of the text.

Appendix “A” contains some medical information on the subject of Insomnia and sleep-inducing drugs.

Appendix “B” and “C” have been translated from the Latin by A. T. Craig especially for use in “The Gift of Sleep.” They are of value chiefly as showing the attitude of the ancients towards this natural function.

Appendix “D” gives some provisional conclusions based on a Questionnaire on Sleep. The returns are as yet incomplete.