she knew he had gone off to lewiston raceway last night , just as he almost always did during the evening ( presumably because the people he met there were more interesting than the people he met every day in castle rock-his wife , for instance ) , and when she woke up this morning , she expected to find his half of the bed empty ( or not slept in at all , which would mean that he had spent the rest of the night dozing in his study chair ) and to hear him downstairs , muttering to himself in his bad-tempered way .