In this way Bridger avenged himself for the spirit of distrust so often shown for what he had related. The time presently came, however, when the public learned, not only how large a measure of truth there was in his stories, but also how ingenious a tale he could weave from very inadequate material. CHAPTER VII. RAYNOLDS' EXPEDITION. On the 13th of April, 1859, Captain W. F. Raynolds, of the Corps of Topographical Engineers, U. S. A., was ordered to explore "the region of country through which flow the principal tributaries of the Yellowstone River, and the mountains in which they, and the Gallatin and Madison Forks of the Missouri, have their source." This was the first government expedition[V] directed to the precise locality which is now embraced in the Yellowstone National Park. It is interesting to us, not for what it accomplished--for it fortunately failed to penetrate the Upper Yellowstone country--but because it gives an admirable _resumé_, in the form of a report and a map, of the geographical knowledge of that country down to the date of actual discovery. [V] Accompanying this expedition as geologist was Dr. F. V. Hayden, whose name is so intimately connected with the history of the Yellowstone Park. James Bridger was guide to the party. Captain Raynolds was in the field during the two seasons of 1859 and 1860; but it was only in the summer of 1860 that he directed his efforts toward the country in which we are particularly interested. In May of that year the expedition left its winter quarters at Deer Creek, Wyo., and marched to the junction of the Wind River and the Popo Agie where these streams unite under the name of Bighorn River. Here the party divided. One division under Captain Raynolds was to ascend the Wind River to its source and then cross to the head waters of the Yellowstone. This stream they were to follow down to the Great Bend, and then cross over to the Three Forks of the Missouri. The other party, under Lieutenant Maynadier, was to skirt the east and north flanks of the Absaroka Range and to join the first party at the Three Forks, if possible, not later than July 1st. Captain Raynolds was charged with other instructions than those mentioned in his order, which must be kept in mind in order properly to account for the final outcome of the expedition. A total eclipse of the sun was to occur on July 18th of that year, and its line of greatest occultation lay north of the British boundary. It was desired that Captain Raynolds should be present in that locality in time to observe the eclipse. This condition, rather than impassable mountains or unmelted snows, was the chief obstacle to a thorough exploration of the Upper Yellowstone.