Bernal Diaz offers account of Spanish spies doubling as Indigenous persons.
Albert Idell, ed., The Bernal Diaz Chronicles: The True Story of the Conquest of Mexico (New York: Doubleday, 1956), 227
Sandoval told how he had sent the furious cleric Guevara to Mexico as a prisoner with Vergara, about which I have told you, and how he had sent two soldiers disguised as Indians to the camp of Narváez while he was not still camped on the beach. Because they were dark, they did not look like Spaniards, but like real Indians. Each carried plums on his back, and went to the hut of the brave Salvatierra, who gave them a string of yellow beads for the plums. After they had sold the plums, Salvatierra, thinking they were Indians, ordered them to bring grass for his horse from the banks of a nearby stream. . .[T]hey squatted on their heels like Indians until nightfall, keeping their eyes and senses alert to what certain soldiers who had come to keep company with Salvatierra were saying.