I am searching for the origin of a song that starts out:

"In Autumn when evening was spreading, her opinions of darkness o'er all,
In numbers the Indians came treading, approaching the Niagara Falls

... It is a wonderful song about a group of Indians who chose by lot a person to go over Niagara as a sacrifice each year. This particular year the Chieftain's Daughter was chosen. Rather than question the Gods, the Chieftain went over with her! It goes by the possible names of The Chieftain's Daughter or Bright Skies.