Congress had tried hard to bring about peace with the southern Indians, both by sending commissioners to them and by trying to persuade the three southern States to enter into mutually beneficial treaties with them. A successful effort was also made to detach the Chickasaws from the others, and keep them friendly with the United States. Congress as usual sympathized with the Indians against the intruding whites, although it was plain that only by warfare could the red men be permanently subdued. [Footnote: State Dep. MSS., No. 180, p. 66; No. 151, p. 275. Also letters of Richard Winn to Knox, June 25, 1788; James White to Knox, Aug. 1, 1788; Joseph Martin to Knox, July 25, 1788.] Sufferings of the Cumberland People. The Cumberland people felt the full weight of the warfare, the Creeks being their special enemies. Robertson himself lost a son and a brother in the various Indian attacks. To him fell the task of trying to put a stop to the ravages. He was the leader of his people in every way, their commander in war and their spokesman when they sought peace; and early in 1788 he wrote a long letter on their behalf to the Creek chief McGillivray. After disclaiming all responsibility for or connection with the Franklin men, he said that the settlers for whom he spoke had not had the most distant idea that any Indians would object to their settling on the Cumberland, in a country that had been purchased outright at the Henderson treaty. He further stated that he had believed the Creek chief would approve of the expedition to punish the marauders at the Muscle Shell Shoals, inasmuch as the Creeks had repeatedly assured him that these marauders were refractory people who would pay no heed to their laws and commands. Robertson knew this to be good point, for as a matter of fact the Creeks, though pretending to be peaceful, had made no effort to suppress these banditti, and had resented by force of arms the destruction of their stronghold. [Footnote: Robertson MSS. Robertson to McGillivray. Letters already cited.] Robertson's Letters to the Creek Chief McGillivray