From the show "Picturing History: Ledger Drawings of the Plains Indians, '' through Dec. 20, at the Fairfield {Conn.} University Art Museum, featuring the artwork of Plains Indians from the late 19th Century.
The museum explains that the works are called ''ledger drawings" because they were drawn on accounting ledgers; no two are the same, with some drawn with graphite, others painted with watercolors.
The museum says that the drawings are practically unknown to most scholars. When they have been studied, it's usually as historical documents, not as art.
