High mountain air makes newcomers cough blood from their lungs

Evidence

A great many people come up here in the summer. The rarefied air produces great oppression on the lungs, accompanied with bleeding. It is said that you can tell a new arrival by seeing him go about holding a blood-stained handkerchief to his mouth. — Isabella L. Bird, A Lady’s Life in the Rocky Mountains, 192

Categorization

• CANDY: Bleeding into a handkerchief as the tell-tale sign of a tenderfoot — instantly repeatable at a dinner table.