are extant likewise some letters from him to Cicero, and others to his friends, concerning his domestic affairs; in which, if there was occasion for secrecy, he wrote in cyphers; that is, he used the alphabet in such a manner, that not a single word could be made out. The way to decipher those epistles was to substitute the fourth for the first letter, as d for a, and so for the other letters respectively. Some things likewise pass under his name, said to have been written by him when a boy, or a very young man; as the Encomium of Hercules, a tragedy entitled Oedipus, and a collection of Apophthegms; all which Augustus forbad to be published, in a short and plain letter to Pompeius Macer, who was employed by him in the arrangement of his libraries.
(38) LVII. He was perfect in the use of arms, an accomplished rider, and able to endure fatigue beyond all belief. On a march, he used to go at the head of his troops, sometimes on horseback, but oftener on foot, with his head bare in all kinds of weather. He would travel post in a light carriage 79 without baggage, at the rate of a hundred miles a day; and if he was stopped