In late 1910, an English flier then, George Dyott teamed up with the American flier Henry Walden to form the Walden-Dyott Aeronautic Co. at Hempstead Plains field to build monoplanes. Early in 1911, their business was slow and they decided to disband their company where Dyott received two of the monoplanes, which he later sold in South America.

Reference for the summary & highlights of the following article was taken from:

The Peter Fleming's book "Brazilian Adventure" - Mystery of Colonel Fawcett, page 23-25 

In May 1928, George Dyott led a hazardous expedition in five large canvas boats from the source to the mouth of the Xingu to trace Colonel Fawcett. The expedition was largely financed by an American Newspaper Syndicate (North American Newspaper Alliance). 

Dyott started with 64 bullocks, 10 mules, and 26 men; his companions were two camera-men and two wireless operators. In May 1928, the expedition followed Fawcett’s three-year-old trail northward from Cuyaba; Dyott traced Fawcett from Dead Horse Camp down the Rio Kuliseu to a village of the Anauqua (Nafaqua) Indians. 

Here Dyott was told –in sign language- by the Kalapalos that Fawcett and his two companions had reached the Kuluene in 1925, and that although both young men were lame and exhausted Fawcett had taken them on, after a short rest, into the unknown country lying east of the river.

For five days the watching Indians had seen smoke from their fires, as they blazed their way through the tall grass of the campo; on the sixth there had been no smoke, and Dyott’s informants described the tragedy which its absence indicated. 

They were convinced that the party has been massacred. Dyott was then within four or five days march of the place where Fawcett met his death, and Aloique, son of the chief of the Kalapalos, said that the bones were still there. The main body of the expedition had continued down the Kuliseu to its point of confluence with the Kuluene, and Dyott, who mistrusted Aloique’s motives, decided to rejoin them before returning with his companions to visit the scene of the tragedy. This, as it turned out, he was never able to do.

He found the camp at the junction of the two rivers full of Indians, importunate in their demands for the knives and trinkets, which he had distributed at first with perhaps too lavish a generosity, and he did not like their attitude. Moreover, he was running short of food. So under cover of night he slipped off down the Xingu in light canoes, jettisoning many hundreds of film to facilitate his escape and pausing only (when he was out of reach) to announce to the world by wireless that he was surrounded by Indians. 

Many years later, American photographer Loren Mac Intyre found Dyott, then aged 86, living as a recluse among the Indians.