The Run, first published in 1959 and a classic in nature-writing, describes the life-history of the alewife, a small type of herring that spawns in freshwater, travels to the ocean when a fingerling, and then returns to its freshwater birthplace in impressive swarms as an adult. Author John Hay (1915-2011) was a naturalist who spent much of his life on Cape Cod and was the co-founder and long-time president of the Cape Cod Museum of Natural History. Illustrated with pen and ink drawings and two maps.