This high purpose Catlin followed throughout the remainder of his life with unwavering fidelity. He visited almost every Indian tribe in North America, gathering sketches and making descriptive notes. He also visited South America, and afterward spent many years in Europe exhibiting his work. The result of his labors was a gallery of more than six hundred pictures, now happily forever safe under the protection of the Smithsonian Institution in Washington, wherein he delineated the portraits of famous chiefs and the scenes and customs of Indian life. This work he supplemented with the scarcely less valuable work of his pen, leaving behind him probably the best popular description of the native races that has ever been written. His work is a perennial fountain to which students of Indian themes will ever resort. Valuable as it was considered in his lifetime, each passing year makes it more valuable still. Catlin's enthusiasm for every thing pertaining to Indian life, and the grief with which he beheld the certain fading away of it all before the rapid progress of civilization, suggested to him the idea which was to find partial fulfillment at the time to which our narrative has now been carried. In order to preserve, at least on a small scale, the native fauna of America, and a remnant of the Indian races, he proposed that the government should set apart, in some suitable locality of the West, a large tract of land, to be preserved forever as a "_Nation's Park_, containing man and beast, in all the wildness and freshness of their nature's beauty." With his natural enthusiasm and vigor, he unfolded his idea, concluding: "I would ask no other monument to my memory, nor any other enrollment of my name among the famous dead, than the reputation of having been the founder of such an institution." In the report of the late Prof. Joseph Henry to the Board of Regents of the Smithsonian Institution for 1871, it is stated that Catlin made a proposition to the government in 1832 "to reserve the country around these [the Yellowstone] geysers as a public park." While it is more than probable, considering the date, and the wide acquaintance of Mr. Catlin with the traders and Indians of the West, that he had heard of the geyser regions, still there is not sufficient evidence attainable to justify our acceptance of the above statement. But in every thing else except the particular locality, and the plan of providing a reservation for the Indians, Catlin's idea was the same as that finally adopted by Congress.