Other chiefs accompanied him, and on their way they received many official attentions.

An incident which occurred at Guilford Court House, North Carolina, displays McGillivray's character in a kindly light.

A woman whose husband had been killed by Creek Indians and who with her children had been made captive, visited McGillivray to thank him for effecting their release, and it was disclosed that he had since that time been contributing to the support of the family.

At New York, the recently organized Tammany Society turned out in costumes supposed to represent Indian attire and escorted the visiting chiefs to Federal Hall.
Eventually Washington himself went to Federal Hall in his coach of state and in all the trappings of official dignity, to sign the treaty concluded with the Indians.

The treaty, which laid down the pattern subsequently followed by the government in its dealings with the Indians, recognized the claims of the Creek nation to part of the territory it claimed, and gave compensation for the part it relinquished by an annuity of fifteen hundred dollars for the tribe, and an annuity of one hundred dollars for each of the principal chiefs.
For his part in the transaction McGillivray was commissioned an agent of the United States with the rank of brigadier-general, a position which he sustained with dignity.