"Henry D. Thoreau" by F. B. Sanborn is a biography written in the late 19th century. This work delves into the life and character of the iconic American writer and philosopher Henry D. Thoreau, highlighting his philosophical perspectives, personal relationships, and contributions to literature and ecology. Through the lens of Sanborn's insights and connections to Thoreau, readers gain a deeper appreciation for Thoreau's unique blend of naturalism and transcendental thought. The opening of the biography sets the stage for an exploration of Thoreau's lineage, connecting his ancestry to both New England and the island of Jersey. F. B. Sanborn chronicles the early years of Thoreau's family, particularly focusing on his parents, John Thoreau and Cynthia Dunbar, their roots, and how these factors influenced the upbringing of their son. The detailed familial history serves to paint Thoreau as a product of a diverse and intellectually rich background, preparing readers for a nuanced understanding of his later writings and philosophical musings. (This is an automatically generated summary.)