The backside of Rondon’s bill shows the people whose tenancy of the land predated the Europeans. Rondon himself was half-Indian, which no doubt helps explain his sympathies.

One more detail: in 1914, at the age of 49, Rondon took Teddy Roosevelt on an expedition to explore the River of Doubt. Tell me that's not a movie begging to be made. Spake the Wiki:

"During the trip up the river, Roosevelt contracted malaria and a serious infection resulting from a minor leg wound. These illnesses so weakened Roosevelt that, by six weeks into the expedition, he had to be attended day and night by the expedition's physician, Dr. Cajazeira and his son, Kermit. By this time, Roosevelt considered his own condition a threat to the survival of the others. At one point, Kermit had to talk him out of his wish to be left behind so as not to slow down the expedition, now with only a few weeks rations left. Roosevelt was having chest pains when he tried to walk, his temperature soared to 103°F (39°C), and at times he was delirious. He had lost over fifty pounds (20 kg). Without the constant support of Dr. Cajazeira, and Rondon's leadership, Roosevelt would likely have perished.

"Upon his return to New York, friends and family were startled by Roosevelt's physical appearance and fatigue. Roosevelt wrote to a friend that the trip had cut his life short by ten years. He might not have really known just how accurate that analysis would prove to be, because the effects of the South America expedition had so greatly weakened him that they significantly contributed to his declining health. For the rest of his life, he would be plagued by flareups of malaria and leg inflammations so severe that they would require hospitalization."