[It] is very long since I have read any book with such enjoyment as I found in the reading of Cimarron. Its pace, its colour, its panache, its gallant and defiant courage, its admirable, unapologetic Americanism are all delightful. It is a story of the settling of Oklahoma, and especially of the city of Osage and the dreadful injustice done by the United States to the Indians…. [The novel], in its praise of the past betrays, I fancy, the author's distaste for much in America of to-day.

Proteus, "New Novels: 'Cimarron'," in New Statesman (© 1930 The Statesman Publishing Co. Ltd.), Vol. XXXV, No. 891, May 24, 1930, p. 217.