mythology, which retained the name of Hyginus and the title of _Genealogiae_, came to be generally used in the schools of the grammarians. The demand for school-books was now rapidly increasing; and as the great classical authors published their works, an abundant supply of material was given to the ingenious and learned. The _grammaticae tribus_, whom Horace mentions with such disdain, [64] were already asserting their right to dispense literary fame. They were not as yet so compact or popular a body as the rhetoricians, but they had begun to cramp, as the others had begun to corrupt, literature. Dependence on the opinion of a clique is the most hurtful state possible, even though the clique be learned; and Horace showed wisdom as well as spirit in resisting it. The endeavour to please the leading men of the world, which Horace professed to be his object, is far less narrowing; such men, though unable to appraise scientific merit, are the best judges of general literature. The careful methods of exact inquiry, were, as we have said, directed also to law, in which Labeo remained the highest authority. Capito abated principle in favour of the imperial prerogative. They did not, however, affect philosophy, which retained its original colouring as an _ars vivendi_. Many of Horace's friends, as we learn from the _Odes_, gave their minds to speculative inquiry, but, like the poet himself, they seem to have soon deserted it. At least we hear of no original investigations. Neither a metaphysic nor a psychology arose; only a loose rhetorical treatment of physical questions, and a careful collection of ethical maxims for the most part eclectically obtained. SEXTIUS PYTHAGOREUS--there were two born of this name, father and son-- wrote in Greek, reproducing the oracular style of Heraclitus. The _gnuomai_, which were translated and christianised by Rufinus, were stamped with a strongly theistic character. A few inferior thinkers are mentioned by Quintilian and Seneca, as PAPIRIUS FABIANUS, SERGIUS FLAVIUS, and PLOTIUS CRISPINUS. Of these, Papirius treated some of the classificatory sciences, which now first began to attract interest in Rome. Botany and zoology were the favourites. Mineralogy excited more interest on its commercial side with regard to the value and history of jewels; it was also treated in a mystic or imaginative way.