The Louisiana Purchase had left a disputed boundary, which, with other things, threatened war between the United States and Spain. When Pike crossed over the Rocky Mountains to the West side, he was exploring disputed territory, though he was lost and thought he was on the Red River, instead of the Rio Grande, the former being within the limits of the Louisiana Purchase. He had passed that River, however, above its source, and had gotten over on the Rio Grande, which territory was still claimed by Spain. Had he found the Red River, it was his intention to build rafts and follow it towards its junction with the Mississippi, landing on his way at Nachitoches in Louisiana, which is about one hundred and fifteen miles west of Natchez--that being the Military Post to which he was to report. Notice of his presence in the Mountains had reached Santa Fe, where Spanish soldiers were stationed. The Governor sent an officer and fifty dragoons to bring him out. He was taken south to Santa Fe, going peaceably, but all the time protesting in the name of his Government at the indignity. Here he was questioned, his papers examined, and those in authority being undecided as to how to handle the matter because of its national character, they sent him far away to the south, to Chihuahua in New Spain, the headquarters of the Military Chief of Upper Mexico, where he arrived April 2d. After being detained for some days, all his papers again gone over in a vain endeavor to find something incriminating, it was determined to send him East to his destination, with an escort, his party, however, not to be permitted to accompany him, but to be sent after him. In July, 1806, he arrived at Nachitoches, where he was warmly welcomed by his fellow officers. A little later he received a letter of thanks from the Government. He was made a Major in the Army in 1808; Lieutenant Colonel in 1809; Deputy Quartermaster-General and Colonel both, in 1812; Brigadier General in 1813. In that year he was sent by the Government on an expedition against York in Upper Canada, at the time of our second war with England. Here a magazine of the Fort exploded, a mass of stone fell on him and crushed him, and he died at the age of thirty-five. In his pocket was found a little volume containing a touching admonition to his son. He urged that he regard his honor above everything else, and that he be ready to die for his country at any time.