Arrian

“ Therefore the enemy's cavalry, being formed into a dense square, will attack us as we emerge from the water in broken ranks and in column, in the place where we are weakest. At the present juncture the first repulse would be difficult to retrieve, as well as perilous for the issue of the whole war."
But to this Alexander replied: "I recognise the force of these arguments, O Parmenio; but I should feel it a disgrace, if, after crossing the Hellespont so easily, this brook (for with such an appellation he made light of the Granicus) should bar our passage for a moment. ”

“ For I think that the enemy, being, as they are, much inferior to us in infantry, will not dare to pass the night near us, and therefore they will permit the army to cross the ford with ease at daybreak. ”