Horatio Hale’s The Iroquois Book of Rites (Gutenberg text of entire book, Sacred Texts version broken up into chapters), originally published in 1883, contains all sorts of historical and cultural information about the Five (later Six) Nations of the Iroquois; its centerpiece is the Ancient Rites of the Condoling Council in both Iroquois and English (preceded by a sketch of The Iroquois Language). Here’s the famous Condolence Hymn chanted at meetings of the League:
I come again to greet and thank the League;
I come again to greet and thank the kindred;
I come again to greet and thank the warriors;
I come again to greet and thank the women.
My forefathers,—what they established,
My forefathers,—hearken to them!