Titus Groan (Gormenghast Trilogy)

The walls of the vast room which were streaming with calid moisture, were built with gray slabs of stone and were the personal concern of a company of eighteen men known as the 'Grey Scrubbers'.... On every day of the year from three hours before daybreak until about eleven o'clock, when the scaffolding and ladders became a hindrance to the cooks, the Grey Scrubbers fulfilled their hereditary calling.