Henry Ford, John Burroughs and Frank Sanborn at Thoreau's Grave, Concord, Massachusetts, September 1913

In 1913, naturalist John Burroughs and industrialist Henry Ford visited Concord, Massachusetts where two of Burroughs' early literary influences -- Ralph Waldo Emerson and Henry David Thoreau -- once resided. Ford, Burroughs and their traveling companions visited Emerson's home, Walden Pond and the gravesites of the two 19th-century Transcendentalists. Frank Sanborn, a Burroughs' acquaintance and friend of Emerson and Thoreau, served as guide for the distinguished visitors.