of his to the senate, written in a manner never practised by any before
him; for they are distinguished into pages in the form of a memorandum
book whereas the consuls and commanders till then, used constantly in
their letters to continue the line quite across the sheet, without any
folding or distinction of pages. There 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 by floods in the rivers, he swam across, or floated on
skins inflated with wind, so that he often anticipated intelligence of
his movements. [80]

LVIII. In his expeditions, it is difficult to say whether his caution or
his daring was most conspicuous. He never marched his army by roads
which were exposed to ambuscades, without having previously examined the
nature of the ground by his scouts. Nor did he cross over to Britain,