Psmith in the City by P. G. Wodehouse

Mike had refused to accompany Psmith to the meeting that evening, saying that he got too many chances in the ordinary way of business of hearing Mr. Bickersdyke speak, without going out of his way to make more. So Psmith had gone off to Kenningford alone, and Mike, feeling too lazy to sally out to any place of entertainment, had remained at the flat with a novel.

He was deep in this, when there was the sound of a key in the latch, and shortly afterwards Psmith entered the room. On Psmith's brow there was a look of pensive care, and also a slight discoloration. When he removed his overcoat, Mike saw that his collar was burst and hanging loose and that he had no tie. On his erstwhile speckless and gleaming shirt front were number of finger-impressions, of a boldness and clearness of outline which would have made a Bertillon expert leap with joy.