The Nuttall Encyclopedia
A wood-nymph in love with Narcissus, who did not return her love, in consequence of which she pined away till all that remained of her was only her voice.
Wood, James, ed. Entry for 'Echo'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/e/echo.html. Frederick Warne & Co Ltd. London. 1900.