R. Cadwallader Smith was a British nature writer and educator best known for his contributions to Cassell's Eyes and No Eyes series of children's natural history books. Writing in the early twentieth century, he introduced young readers to the wonders of the natural world through accessible lessons on seashore life, ocean creatures, animal behavior, and wildlife habitats. His books encouraged careful observation of nature and became popular educational resources for schools and families. Though little is known about his personal life, his works remain valued examples of the classic nature-study movement.

His books were widely used in schools and homes during the early decades of the twentieth century and reflected the growing movement toward nature study as part of children's education. Although details about his birth, death, education, and personal life remain elusive, his works continue to be published and are still appreciated by homeschooling families and readers interested in classic nature-study literature.