Bridge on Orange and Alexandria Rail Road, as Repaired by Army Engineers under Colonel Herman Haupt https://www.rawpixel.com/image/9329230/photo-image-vintage-fire-woodenFree Image from public domain licensePresident Lincoln, Allan Pinkerton, and Maj. Gen. John A. McCleland. Original public domain image from Flickr https://www.rawpixel.com/image/8799525/photo-image-plant-art-treeFree Image from public domain license