In descending abrupt hills and mountains one wheel of a loaded wagon should always be locked, as this relieves the wheel animals and makes every thing more secure. When the declivity is great both rear wheels should be locked, and if very abrupt, requiring great effort on the wheel animals to hold the wagon, the wheels should be rough-locked by lengthening the lock-chains so that the part which goes around the wheels will come directly upon the ground, and thus create more friction. Occasionally, however, hills are met with so nearly perpendicular that it becomes necessary to attach ropes to the rear axle, and to station men to hold back upon them and steady the vehicle down the descent. Rough-locking is a very safe method of passing heavy artillery down abrupt declivities. There are several mountains between the Missouri River and California where it is necessary to resort to one of the two last-mentioned methods in order to descend with security. If there are no lock-chains upon wagons, the front and rear wheels on the same side may be tied together with ropes so as to lock them very firmly. It is an old and well-established custom among men experienced in frontier life always to cross a stream upon which it is intended to encamp for the night, and this rule should never be departed from where a stream is to be forded, as a rise during the night might detain the traveler for several days in awaiting the fall of the waters. STORMS. In Western Texas, during the autumn and winter months, storms arise very suddenly, and, when accompanied by a north wind, are very severe upon men and animals; indeed, they are sometimes so terrific as to make it necessary for travelers to hasten to the nearest sheltered place to save the lives of their animals. When these storms come from the north, they are called "_northers;_" and as, during the winter season, the temperature often undergoes a sudden change of many degrees at the time the storm sets in, the perspiration is checked, and the system receives an instantaneous shock, against which it requires great vital energy to bear up. Men and animals are not, in this mild climate, prepared for these capricious meteoric revolutions, and they not unfrequently perish under their effects. While passing near the head waters of the Colorado in October, 1849, I left one of my camps at an early hour in the morning under a mild and soft atmosphere, with a gentle breeze from the south, but had marched only a short distance when the wind suddenly whipped around into the north, bringing with it a furious chilling rain, and in a short time the road became so soft and heavy as to make the labor of pulling the wagons over it very exhausting upon the mules, and they came into camp in a profuse sweat, with the rain pouring down in torrents upon them.