The next morning an ambulance and escort-wagon drove up to the Captain's quarters, and we loaded ourselves in--shot-guns, ammunition, blankets, and the precious paper of Senor Munos; for, only the week before, the custom-house rangers had carefully escorted an American hunting-party a long distance back to the line for lack of the little paper and red seals. We rattled over the bridge, past the Mexican barrack, while its dark-skinned soldiery--who do not shoot quails--lounged in the sunshine against the whitewashed wall. At the first outpost of the customs a little man, whose considerable equatorial proportions were girted with a gun, examined our paper, and waved us on our way. Under the railroad bridge of the International an engineer blew his whistle, and our mules climbed on top of each other in their terror. We wound along the little river, through irrigating ditches, past dozens of those deliciously quaint adobe houses, past the inevitable church, past a dead pony, ran over a chicken, made the little seven-year-old girls take their five-year-old brothers up in their arms for protection, and finally we climbed a long hill. At the top stretched an endless plain. The road forked; presently it branched; anon it grew into twigs of white dust on the gray levels of the background. The local physician of Eagle Pass was of our party, and he was said to know where a certain tank was to be found, some thirty miles out in the desert, but no man yet created could know which twig of the road to take. He decided on one--changed his mind--got out of the ambulance, scratched his head, pondered, and finally resolution settled on his face. He motioned the driver to a certain twig, got in, and shut his mouth firmly, thus closing debate. We smoked silently, waiting for the doctor's mind to fog. He turned uneasily in his seat, like the agitated needle of a compass, and even in time hazarded the remark that something did not look natural; but there was nothing to look at but flat land and flat sky, unless a hawk sailing here and there. At noon we lunched at the tail of the ambulance, and gently “jollied” the doctor's topography. We pushed on. Later in the afternoon the thirsty mules went slowly. The doctor had by this time admitted his doubts--some long blue hills on the sky-line ought to be farther to the west, according to his remembrance. As no one else had any ideas on the subject, the doctor's position was not enviable. We changed our course, and travelled many weary miles through the chaparral, which was high enough to stop our vision, and stiff enough to bar our way, keeping us to narrow roads. At last the bisecting cattle trails began to converge, and we knew that they led to water--which they did; for shortly we saw a little broken adobe, a tumbled brush corral, the plastered gate of an _acequia,_ and the blue water of the tank. [Illustration: 08 SUPPER IN THE CORRAL]