Sudarium

"[…] Watt, faithful to his rule, took no more notice of this aggression than if it had been an accident. This he found was the wisest attitude, to staunch, if necessary, inconspicuously, with the little red sudarium that he always carried in his pocket, the flow of blood, to pick up what had fallen, and to continue, as soon as possible, on his way, or in his station, like a victim of mere mischance."