"On occasions, after drinking a pint of beer at luncheon, there would be a flow into my mind with sudden and unaccountable emotion, sometimes a line or two of verse, sometimes a whole stanza, accompanied, not preceded by a vague notion of the poem which they were destined to form a part of.... I say bubble up because, so far as I could make out, the source of the suggestions thus proffered to the brain was the pit of the stomach."