An eminent physician, John Caius, wrote an eyewitness account of the disease at this time called "A Boke or Counseill Against the Disease Commonly Called the Sweate, or Sweatyng Sicknesse".
Известный врач Джон Киз (латинизировавший свою фамилию Keys как Caius — Гай) как свидетель описал её в особой книге: "A Boke or Counseill Against the Disease Commonly Called the Sweate, or Sweatyng Sicknesse".