In the de Officiis we have, save for the latter Philippics, the great orator's last contribution to literature. The last, sad, troubled years of his busy life could not be given to his profession; and he turned his never-resting thoughts to the second love of his student days and made Greek philosophy a possibility for Roman readers. The senate had been abolished; the courts had been closed. His occupation was gone; but Cicero could not surrender himself to idleness. In those days of distraction (46-43 b.c.) he produced for publication almost as much as in all his years of active life. The liberators had been able to remove the tyrant, but they could not restore the republic. Cicero's own life was in danger from the fury of mad Antony and he left Rome about the end of March, 44 b.c. He dared not even stop permanently in any one of his various country estates, but, wretched, wandered from one of his villas to another nearly all the summer and autumn through. He would not suffer himself to become a prey to his overwhelming sorrow at the death of the republic and the final crushing of the hopes that had risen with Caesar's downfall, but worked at the highest tension on his philosophical studies.