Sentence:  Everybody had washed before going to bed, apparently, and the bowls were ringed with a dark sediment which the hard, alkaline water had not dissolved. Shutting the door on this disorder, he turned back to the kitchen, took Mahailey's tin <WSD>basin</WSD>, doused his face and head in cold water, and began to plaster down his wet hair. 
Meaning of the word marked with <WSD> tags:  a wide bowl for washing, sometimes affixed to a wall