The Conquest of Gaul [with Biographical Introduction]

by Gaius Julius Caesar

XXV.—The breadth of this Hercynian forest, which has been referred to above, is to a quick traveler, a journey of nine days. For it cannot be otherwise computed, nor are they acquainted with the measures of roads. It begins at the frontiers of the Helvetii, Nemetes, and Rauraci, and extends in a right line along the river Danube to the territories of the Daci and the Anartes: it bends thence to the left in a different direction from the river, and owing to its extent touches the confines of many nations; nor is there any person belonging to this part of Germany who says that he either has gone to the extremity of that forest, though he had advanced a journey of sixty days, or has heard in what place it begins.