"To account for this, and other phenomena of Memory, by intermediate causes, many authors, both antient and modern, were fain to suppose, that every thing perceived by us, whether a thought of the mind, or an external object, every thing, in a word, that we remember, makes upon the brain a certain impression, which, remaining for some time after, is taken notice of by the mind, and recognized as the mark of that particular sensation or idea."
— Beattie, James (1735-1803)
(II.i, p. 10)
Beattie, James. Dissertations Moral and Critical (London: Printed for Strahan, Cadell, and Creech, 1783). Facsimile-Reprint: Friedrich Frommann Verlag, Stuttgart-Bad Cannstatt, 1970. <Link to Google Books>