The weather, contrary to our expectations, has been universally cool since we left the Muddy; thick vests, and sometimes coats, have been worn in the noon of a sunny day, and the sun has been sought rather than the shade. The nights have all been cool, and some of them as cold in the middle or latter part of May as the nights usually are in March and April in Great Salt Lake City. Twenty miles from the Vegas, our camp was assailed in the evening, ten o'clock by a shower of arrows from the savage mountain robbers; some of which passed near men's heads and all fell promiscuously among men, women, children and cattle, but did no injury. Our men mustered and returned the fire without effect. Afterwards, in the same place, a savage, single handed, made his way among the cattle, in open day, while they were under the care of armed herdsmen and shot an ox and a mule; one was wounded in the hip, and the other in the leg; but they are both doing well. _Friday, 23d_.--Provided with water and hay we travelled on fourteen miles. Road heavy, up hill and sandy; day hot. Arrived at Salt Spring gold mines towards evening; water brackish; but answered for stock and use. After resting for a few hours we started on in the evening and travelled all night, with the exception of short intervals of rest. The hot day and heavy road had so harassed the cattle that we made but little progress. Next morning we continued to travel, finding no grass nor water. The road was up hill for ten or twelve miles, and rough; the day rather cool. Long before night our hay and water were consumed, and the camp in a suffering condition. Some cattle had given out entirely; and fifteen or twenty miles still intervened between us and water, and without grass sufficient to feed a goat. Six or eight miles of the way was still up hill. This was the most trying time of all. At dark, about fourteen miles from water, _our ten_ was behind, and my two wagons were the rear of all; and some of my oxen had already failed. We still rolled slowly, resting every few minutes. We soon found the different portions of the camp ahead, halted, and lost in slumber--every man and beast, by common consent, sunk in profound slumber, and probably dreaming of water and feed ahead. We, viz., _our ten_, with some exceptions, slipped quietly past them, and resting often and a few minutes at a time continued to roll. The night was cool, and a miraculous strength seemed to inspire the cattle. At sunrise next morning we arrived at the Bitter Springs; the water of which was about as palatable as a dose of salts. The other camps followed us in, and by ten o'clock all were in, except three oxen left by the way, and two wagons with their loads, left twenty miles back. Men and animals were so exhausted that, after digging and improving the water, and a general watering, it was ten hours or more before the cattle were driven to what little feed there was, a mile or two distant.