For Want of Wings is also the carefully researched story of the least known of Yale's four expeditions into the American West, led by eminent paleontologist O. C. Marsh; the friendship between Russell's father and abolitionist John Brown; a portrait of a mother and daughter evolving in self-understanding; and an inquiry into matters of race in American history and the author's own family. In the end, all these pieces converge, like fragments of a fossil, to form an exquisitely patterned work of historical exploration.