Each year over three million people visit the Freedom Trail, a two-and-one-half mile red brick line that tells a story over two centuries old. In 1958, local journalist William Schofield had the idea that Boston's revolutionary sights could be made more accessible to residents and visitors, and conceived of the Freedom Trail. Tourists were going berserk, he wrote, bumbling around and frothing at the mouth because they couldn't find what they were...