We can only guess the feelings of the troglodyte that drew animals on the walls of the Altamira cave, but we have a rough idea of the feelings of the Latin poet Martial towards those who proclaimed his own works as theirs. We know even more precisely the feelings of the Italian 16th century poet Ariosto when he proposed to Duke Alfonso d'Este of Ferrara to share the proceeds that he would obtain from the fines imposed on those who…