"Westmorland, an inland county, bounded on the NW and the N by Cumberland,
on the NE by Durham, on the E and the SE by Yorkshire, on the S and the
SW by Lancashire. Its outline is irregular. Its boundaries, to a considerable
extent and at intervals, are formed by Windermere, Ulleswater, and the rivers
Eamont and Lune. Its greatest length south-south-westward is about 35 miles,
its greatest breadth is 40 miles, its circuit is about 135 miles, and its
area is 500,906 acres"
from The Comprehensive Gazetteer of England and Wales, 1894-5