What did John Smith trade for his freedom and for land around the settlement?

The veracity of Captain John Smith’s exploits has been in doubt since the 1600s. While several events he detailed in his autobiographical writings were corroborated in the accounts of his contemporaries, he was prone to exaggerating his own heroism and resourcefulness. The story of his death-defying 1607 imprisonment in Werowocomoco, the capital of Powhatan lands, was almost certainly embellished before it was published in his Generall Historie of Virginia, New-England, and the Summer Isles in 1624.
Captain Smith’s capture in the New World (for he was captured several times in the Old World, too) occurred during an expedition he led to find the head of the Chickahominy River. After the explorers had gone ashore, a group of Powhatan hunters seized Smith and killed his companions. He was taken to Chief Powhatan, who, according to Smith, seemed intent on fattening him up, executing him, then eating him. Just before he was to be killed, Powhatan’s daughter, Pocahontas, threw herself on Smith and saved his life. Afterward, Chief Powhatan requested “two guns and a grindstone” in exchange for Smith’s freedom. He asked that the Englishman live beside the river on a parcel of land called Capahowasick. The chief would henceforth consider Smith to be his son.
Historians disagree about whether Chief Powhatan ever intended to kill Captain Smith. There is also no consensus on whether Pocahontas could have been present for the would-be execution. Smith himself wrote, not long after his capture, that he hadn’t ever felt he was in danger. On the contrary, he was treated well and escorted back to Jamestown within days or weeks.