On the 8th of April, 1492, in a bedroom of the Carneggi Palace, about three miles from Florence, were three men grouped about a bed whereon a fourth lay dying. The first of these three men, sitting at the foot of the bed, and half hidden, that he might conceal his tears, in the gold-brocaded curtains, was Ermolao Barbaro, author of the treatise 'On Celibacy', and of 'Studies in Pliny': the year before, when he was at Rome in the capacity of ambassador...