"Mrs. Morrow uses as a subhead for We Must March 'A Novel of the Winning of Oregon.' The heroine is the 'golden-haired, golden-voiced Narcissa,' bride of Marcus Whitman, famous medical missionary to the Indians of the Oregon country. It is made to appear that Mrs. Whitman respected but did not love her husband. The foil in the story is no less a character than Sir George Simpson, Governor of the Hudson's Bay Company. The theme is the struggle for Oregon with Whitman's great ride used as heroics in a supreme effort to win the real love of his bride."
