Ab urbe condita
Titus Livius (Livy)
Livy. History of Rome, Volumes 1-2. Roberts, Canon, Rev, translator. London, New York: J. M. Dent and Sons; E. P. Dutton and Co., 1912.
withdrew his troops, but owing to the proximity of the camps his movement was not unobserved. The Samnite cavalry immediately followed on his heels but refrained from actual attack till it grew lighter, nor did the infantry emerge from their camp before daybreak.
As soon as they could see, the cavalry began to harass the Roman rear, and by pressing upon them where difficult ground had to be crossed, considerably delayed their advance.
Meantime the infantry had come up, and now the entire force of the Samnites was pressing on the rear of the column. As the Dictator saw that no further advance was possible without heavy loss, he ordered the ground he was holding to be measured out for a camp. But as the enemy's cavalry was gradually enveloping them, it was impossible to procure wood for the stockade or to commence their entrenchment.