Hardcover. Philadelphia, J.B. Lippincott, 3rd pr., Book: Good, Dust Jacket: None, Hardcover, light green cloth stamped with blue decoration, 427 pages. B&w drawings by Helene Carter. "The intrepid Swallows (explorers John, Susan, Titty, and Roger Walker) and fearsome Amazon pirates (Nancy and Peggy Blackett) sail the high seas, outwitting a pirate and his cutthroat crew, sharks, and the ravenous creatures of Crab Island in search of buried treasure." Hinges tender, pencil notation on dedication page otherwise clean. Mild shelf wear.
