In Agüero, land of Ayerbe, the neighbors crossed different sources before the dawn to avoid the tertian fevers. (the tertian fevers were intermittent fevers that they mainly were brought by people that had been in the war or in the army). They went to the sources: Nueva, Biella, Piejo, Camariellas, Palomas, Carapas and Chaima, and thay washed themselves to be purified the eyes, to uproot warts and to eradicate the goiter.