Wilder, Laura Ingalls. Little House on the Prairie. Harper, New York (1935). illustrated by Helen Sewell
Wilder, Laura Ingalls. On the Banks of Plum Creek. Harper, New York (1937). Drawings By Helen Sewell and Mildred Boyle (illustrator); Original $2.00 price intact on flap
Wilder, Laura Ingalls. By the Shores of Silver Lake. Harper, New York (1939).
Wilder, Laura Ingalls. The Long Winter. Harper, New York (1940). Stated first edition with correct I-P code; Jacket has correct $2.00 price; Illustrated by Sewell, Helen
Wilder, Laura Ingalls. Little Town on the Prairie. Harper, New York (1941). Stated First Edition with lettersK-Q on copyright page; Helen Sewell and Mildred Boyle (illustrator)
Wilder, Laura Ingalls. These Happy Golden Years. Harper., New York (1943).
Wilder, Laura Ingalls. The Long Winter. Harper, New York (1944). Has decorated end papers and drawings by Helen Sewell.
Wilder, Laura Ingalls. Little House in the Big Woods. Harper, New York/ London (1947). Helen Sewell (illustrator);