The Nuttall Encyclopedia
Second largest of the English lakes, lies between Cumberland and Westmorland, 8 m. long, and its average breadth 1 m.; is looked down upon by Helvellyn, on the SW.
Wood, James, ed. Entry for 'Ullswater'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/u/ullswater.html. Frederick Warne & Co Ltd. London. 1900.