Erasmus, whilst absent in France, writes to give him an account of his feelings, and begs him to prescribe for him, as he knows no one else to whom he can turn with equal confidence. After a voyage across the channel, during which he had been four days at sea--making a passage by the way that now takes less than two hours--Erasmus describes his condition, his headache, with the glands behind his ears swollen, his temples throbbing, a constant buzzing in his ears; and laments that no Linacre was at hand to restore him to health by skilful advice. In a subsequent letter he writes from Paris to ask for a copy of a prescription given him while in London by Linacre, but which a stupid servant had left at the apothecary shop, so that Erasmus could not have it filled in Paris. An instance of his skill in prognosis, the most difficult part of the practice of medicine according to Hippocrates and all subsequent authorities, is cited by all his biographers, with regard to his friend William Lily, the grammarian. Lily was suffering from a malignant tumor involving the hip, which surgeons in consultation had decided should be removed. Linacre plainly foretold that its removal would surely prove fatal, and the event verified his unfavorable prognosis. Generally it seems to have been considered that his opinion was of great value in all {97} serious matters, and it was eagerly sought for. Some of the nobility and clergy of the time came even from the Continent over to England by no means an easy journey, even for a healthy man in those days, as can be appreciated from Erasmus's experience just cited--in order to obtain Linacre's opinion. One of Erasmus's letters to Billibaldus Pirckheimer contains a particular account of the method of treatment by which he was relieved of his severe pain under Linacre's direction in a very tormenting attack of renal colic. The details, especially the use of poultice applications as hot as could be borne, show that Linacre thoroughly understood the use of heat in the relaxation of spasm, while his careful preparation of the remedies to be employed in the presence of the patient himself would seem to show that he had a very high appreciation of how much the mental state of the patient and the attitude of expectancy thus awakened may have in giving relief even in cases of severe pain.