The geography of the Water of Leith, which flows from the Pentland Hills through Edinburgh to the sea at Leith, is ideal for milling. In its heyday, before the advent of steam power, it drove nearly 100 mills. A number of these were very close to Juniper Green where Edwin lived and feature in many of his paintings. They've now all either been demolished or converted into housing, but many were still very active in Edwin's time. This work presents an impression of the mills in general rather than representing one particular mill.