In 2019, Christopher Swarth, Harry's grandson and a scientist in his own right, discovered the forgotten manuscript. This book includes the original unpublished manuscript, accompanied by contextual essays from contemporary ornithologists who examine the impact and relevance of Swarth's research on coastal bird diversity, fox sparrow migration, and the systematic puzzle of the timberline sparrow. Expedition maps display field camps and exploration routes, and species checklists illustrate the variety of birds observed at key field sites. To bring additional color and insight, The Origin and Distribution of Birds in Coastal Alaska and British Columbia also includes excerpts from Harry Swarth's field notes, a comprehensive list of Harry Swarth's publications, and a glossary with historic and contemporary bird names. Naturalists, ornithologists, birders, and all those who want to learn more about the natural history of the region will delight in the rediscovery of this long-lost treasure.