Photo Credits U.S Library of Congress: 7, 16, 34, 39, 46, 49, 56, 60, 62, 66, 81, 83, 86, 99, 109, 120, 125, 129, 135, 142, 147, 150, 153, 155, 160, 166, 170, 174, 181, 190, 192, 202, 216, 219, 230, 249, 254, 259, 272, 277, 282, 285, 292, 293, 306, 309, 312, 314, 318, 323, 327, 333, 341, 343, 346, 353, 368, 371, 372, 376, 380, 386, 393, 396, 404, 413, 414, 417, 422, 424, 428, 436, 440; Photos.com: 89, 105, 245, 281; wikimedia: 29, 64, 76, 85, 119, 298; Stock.xchng (www.sxc.hu): 238; Getty: 377