At six o’clock, on the evening of the 6th of June, the three companies of the EIGHTY-SIXTH commenced their march, with only three pints of water per man; the distance in a straight line, was only fifty-eight miles; but the Arab Sheiks, furnished for guides by the Vizier, and made responsible for the safe passage of the detachment, represented that a detour of ten or twelve miles would be necessary to prevent the French intercepting the detachment. After marching two hours over a hard sandy country, Captain Cuyler, Lieutenant Morse, and Lieutenant Goodfellow, were taken so ill as to be unable to proceed. At eleven the troops halted for two hours, then resumed the march until seven in the morning, when they again halted, having performed twenty-six miles of the journey. The day became so intolerably hot, that Lieut.-Colonel Lloyd ordered the tents to be pitched to shelter the men from the sun; but at ten o’clock the guides stated it was necessary to march, as the camels would be so debilitated by the heat, if they rested on the sand, as to require water before they could move again; but if kept in motion they would not be affected in so fatal a degree; adding, if the soldiers slept, the camel drivers might steal the water, which they feared would be found scarcely sufficient. The guides being responsible for the safety of the detachment, Lieut.-Colonel Lloyd acceded to their wishes; the tents were struck at eleven, and the march resumed; the thermometer being at 109. Captain Cuyler soon fainted again, and fell from his horse, and a camel and two men were left to attend him and bring him forward. The men beginning to drop fast in the rear, Lieut.-Colonel Lloyd halted about one o’clock, cut his own baggage from the camels, which example was followed by all the officers, as many men as could be carried were then mounted on the camels, and the whole proceeded. At two o’clock a camseen, or south wind began to blow, the thermometer rose to 116, and afterwards much higher; the officers and soldiers were seized with dreadful sensations:--some were affected with giddiness and loss of sight, and others fell down gasping for breath, and calling for drink. At four o’clock, Lieut.-Colonel Lloyd was forced to halt. The skins had been cracked by the sun, and the water had become of a thick consistence; the men who drank it were seized with vomiting and violent pains. The officers had brought with them some Madeira wine, which they divided among the soldiers; a proportion of spirits were mixed with the remaining water, which was issued to the men, accompanied with the warning, that every drop was in their own possession, half the journey had not been performed, and on their own prudence, in reserving a portion in their canteens, must depend whether or not they should be enabled to accomplish the remainder of the distance.