The Nuttall Encyclopedia
A name given in England to a tidal wave rushing up a river or estuary on the top of another, called also a Bore (q. v .).
Wood, James, ed. Entry for 'Eagre'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/e/eagre.html. Frederick Warne & Co Ltd. London. 1900.