Michael Galban has an interesting post on his blog Edge of the Woods on the artwork of George Heriot.
Native American Adoption Scene from Father Joseph Lafitau
The George Heriot watercolor using the figures from the Father Joseph Lafitau work.
A figure dancing in the "Dance on the Reception of Strangers" 1804-05 painting.
North American Indian Man - Unknown Artist
The same figure in Heriot's "War Dance" from 1804-1805.
Michael has more examples of borrowed artwork and recycling images among painting in his article.
Images from Michael Galban's blog Edge of the Woods.
(The photographer Edward Curtis was know to travel with trunks of clothing which he used to outfit the natives he photographed. So research your sources.)