In the naval engagement that Augustus won of Sextus Pompeius in Sicily, just as they were to begin the fight, he was so fast asleep that his friends were compelled to wake him to give the signal of battle: and this was it that gave Mark Antony afterwards occasion to reproach him that he had not the courage so much as with open eyes to behold the order of his own squadrons, and not to have dared to present himself before the soldiers, till first Agrippa had brought him news of the victory obtained. But as to the young Marius, who did much worse (for the day of his last battle against Sylla, after he had marshalled his army and given the word and signal of battle, he laid him down under the shade of a tree to repose himself, and fell so fast asleep that the rout and flight of his men could hardly waken him, he having seen nothing of the fight), he is said to have been at that time so extremely spent and worn out with labour and want of sleep, that nature could hold out no longer. Now, upon what has been said, the physicians may determine whether sleep be so necessary that our lives depend upon it: for we read that King Perseus of Macedon, being prisoner at Rome, was killed by being kept from sleep; but Pliny instances such as have lived long without sleep. Herodotus speaks of nations where the men sleep and wake by half-years, and they who write the life of the sage Epimenides affirm that he slept seven-and-fifty years together.