Bellmouth levitated a biscuit from the packet and carefully dunked it in his tea. This had to be done just right: dunk it too long and the biscuit could fall apart, too quick and it doesn't get the right blend of hot tea with dry biscuit. He took a satisfied mouthful. Fourty years working for the Equestrian Emergency Railway Service had given him ample time to get his dunking procedure just right.