The cover has been created by the transcriber from elements in the book and has been placed in the public domain.

AN
ESSAY
ON THE
Incubus, or Night-mare.

By JOHN BOND, M. D.

Ac velut in somnis oculos ubi languida pressit

Nocte quies, necquicquam avidos extendere cursus

Velle videmur, et in mediis conatibus ægri

Succidimus; non Lingua valet non corpore notæ

Sufficiunt vires, nec vox nec verba sequuntur.

Virgil. Æneid. xii.