This is a picture of Suzanne David aged about 7. Her hair is in pigtails and she is laughing or grinning, despite the fact that she's missing a couple of prominent teeth.
Reprint, including facsimile of t.-p., of the author's "Sketch of a journey through the western states of North America, from New Orleans, by the Mississippi, Ohio, city of Cincinnati, and falls of Niagara, to New York," London, 1827.