Crummock Water, in the Lake District, is 2.5 miles (4.0 km) long, 0.6 miles (0.97 km) wide, and 140 feet (43 m) deep … its primary inflow is Buttermere Dubs, outflow is the River Cocker, which meets the River Derwent at Cockermouth before entering the Irish Sea.  It is in the administrative county of Cumberland, in the parish of Buttermere, and its western shore forms part of the western boundary of the parish. So there.  Card mailed in 1951 with stamp and postmark.  Grade: 1