For some days no enemy appeared; but at length scattered groups of horsemen began to hover on their flanks; and the soldier, who quitted the line but for a moment, was surrounded and put to death ere his comrades could rescue him. The rapidity with which the Mamelukes rode, and their skill as marksmen, were seconded by the character of the soil and the atmosphere; the least motion or breath of wind being sufficient to raise a cloud of sand, through which nothing could be discerned accurately, while the constant glare of the sun dazzled almost to blindness. It was at Chebreis that the Mamelukes first attacked in a considerable body; and at the same moment the French flotilla was assaulted. In either case the superiority of European discipline was made manifest; but in either case also the assailants were able to retreat without much loss. Meantime the hardships of the march continued; the irregular attacks of the enemy were becoming more and more numerous; so that the troops, continually halting and forming into squares to receive the charge of the cavalry by day, and forced to keep up great watches at night, experienced the extremes of fatigue as well as of privation. In the midst of this misery the common men beheld with no friendly eyes the troop of _savans_ mounted on asses (the common conveyance of the country), with all their instruments, books and baggage. They began to suspect that the expedition had been undertaken for some merely scientific purposes; and when, on any alarm, they were ordered to open the square and give the learned party safe footing within, they used to receive them with military jeerings. "Room for the asses:--stand back, here come the _savans_ and the _demi-savans_." On the 21st of July the army came within sight of the Pyramids, which, but for the regularity of the outline, might have been taken for a distant ridge of rocky mountains. While every eye was fixed on these hoary monuments of the past, they gained the brow of a gentle eminence, and saw at length spread out before them the vast army of the beys, its right posted on an entrenched camp by the Nile, its centre and left composed of that brilliant cavalry with which they were by this time acquainted. Napoleon, riding forwards to reconnoitre, perceived (what escaped the observation of all his staff) that the guns on the entrenched camp were not provided with carriages; and instantly decided on his plan of attack. He prepared to throw his force on the left, where the guns could not be available. Mourad Bey, who commanded in chief, speedily penetrated his design; and the Mamelukes advanced gallantly to the encounter. "Soldiers," said Napoleon, "from the summit of yonder pyramids forty ages behold you;" and the battle began.