In 1832 he traveled the northern Great Plains of the United States here, he became concerned about the destruction of the Indian civilization, wildlife, and wilderness as eastern settlements spread westward.
In 1832 he traveled the northern Great Plains of the United States here, he became concerned about the destruction of the Indian civilization as eastern settlements. In 1832 he traveled the northern Great Plains of the United States here, he became concerned about the destruction of wildlife as eastern settlements. In 1832 he traveled the northern Great Plains of the United States here, he became concerned about the destruction of wilderness as eastern settlements. These eastern settlements were spread westward.