Down to the morning of September 19, the day of the battle, every detail can be determined, if not with certainty, yet with reasonable probability. At this point, however, we encounter very serious difficulties. The two authorities which describe the battle minutely, Froissart and Baker, differ from one another in points too important to be called details, though they agree in representing the Black Prince as having remained in his position. The Chandos Herald, whose testimony is _primâ facie_ deserving of the highest respect, affirms that the prince had in the night made up his mind to retreat, that he had sent off his vanguard to convey the baggage across the stream, and would have followed with his whole army, had not the French made haste to attack the rear-guard. The discrepancy is obviously fundamental;[29] one side or the other must start from a total misconception, and if so, it is hardly worth while to speculate as to what rags of truth may be left in the narrative. The Black Prince's army was as usual divided into three parts, under the earl of Warwick, the prince himself, and the earl of Salisbury. The numbers are disputed, the French being naturally inclined to raise the total, the English to diminish it. The authorities on the English side agree in giving about 8000, and they obviously would have the best means of knowing. A real element of uncertainty is, however, always present, in the doubt whether the attendants on the knights are to be added, or are meant to be included in the number given of other soldiers besides the men-at-arms and archers. Probably it would be safe to affirm that the number did not exceed 10,000 of all arms. Having to fight a defensive action against very superior forces, the prince necessarily resorted to tactics much like those of Crecy. The earl of Warwick's division, comprising comparatively a large proportion of archers, lined the hedge in front. Salisbury's men-at-arms, dismounted, were drawn up in line, a stone's-throw back from the gap in the hedge, with archers on their flanks, who would naturally be thrown forwards. The prince's own "battle" he moved[30] up on to a gentle eminence on one flank; this was at the spot marked Bernon on the map, and on the left flank, assuming Colonel Babinet to be right in his identification of the position. From this point he returned after the battle had begun, to sustain Warwick and Salisbury, except that he throughout kept some hundreds of men-at-arms mounted, in reserve.