“Those who have been bitten by the tarantula shortly thereafter fall to the ground half-dead, with a loss of strength and senses, with difficult breathing or moaning, often immobile and lifeless. With the beginning of the music, little by little these symptoms are attenuated, and the patient begins to move his fingers, his hands and then his feet, followed by other limbs; as the melodic rhythm becomes more pressing, the movement of his limbs gradually increases. If the patient is lying on the floor, he springs up to start the dance, sighs, and begins to contort himself in very strange ways. These first dances often last two or three hours: and after having rested briefly on the bed to wipe away his perspiration and to restore his strength, the patient resumes dancing with the same vigor. This can take place as many as a dozen times per day. The dances begin around dawn and continue without pause until around one in the afternoon. Sometimes they are compelled to stop, not because of their tiredness, but because they have perceived some dissonance in the musical instruments, a dissonance which, when it is perceived, provokes deep sighs and stabs of pain in the patient’s heart. They sigh and grieve at length until they resume dancing, the harmony having been reestablished. Around midday they rest from the music and dance. They put themselves to bed until their perspiration is over and then they refresh themselves with broth or over light food, given that the very serious lack of appetite which afflicts them would not permit them to take more substantial food. Around one o’clock in the afternoon, or at the latest around 2, they resume their dances with the same vigor. These dances last until evening, whereupon they have another light meal and then finally fall asleep. These dances usually continue for four days; rarely do they go beyond the sixth day. It is uncertain when the end will occur, since many continue to dance until they feel free of the symptoms, which usually takes place after the third or fourth day.” – Giorgio Baglivi, Dissertatio de anatome, morsu et effectibus tarantulae pg. 313