"official" instructions were to avoid Spanish territory. After three months rest, Pike and 23 men moved up the Osage River on barges and followed the Arkansas River after trading barges for horses.
Pike's view of the Plains as a treeless wasteland would help establish the myth of the Great American Desert which inhibited settlement for decades.

Winter was coming and the men were deep in Spanish territory and built crude shelters. Local authorities were out to locate and arrest Pike. He was captured by the Spanish and taken to Santa Fe. From there he was dispatched under guard to Chihuahua, Mexico and escorted back to the US territory via Texas.
With all of his maps and papers gone, Pike relied on his memory for knowledge of the Southwest in a report published in 1807. Pike was killed in the War of 1812 as a Brigadier General.
Next time...Drifting Back to War
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On This Day in Pioneer History: On January 18, 1895, Wilhelm Röntgen discovered X-rays emanating from Crookes tubes and the many uses for X-rays were immediately apparent. One of the first X-ray photographs was made of the hand of Röntgen's wife.