Premise: Swift Rivers is a children's historical novel by Cornelia Meigs. Set initially in 1835 in Minnesota, it is a story of the early days of the logging industry, when logs were floated down the Mississippi to St. Louis. The novel, illustrated by Forrest W. Orr, was first published in 1931 and was a Newbery Honor recipient in 1933.
Hypothesis: It was published in 1930 + 1