Here are some pictures for some, though not all, of the figures in this timeline, and in no real order.
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Samuel Luther (born Samuel Luther Dana, July 11, 1795-November 3, 1867), Democratic Congressman from Indiana, Vice-Presidential candidate in 1828, Presidential candidate in 1834 and Speaker of the House. IOTL, Dana was a chemist. IITL, as a veteran of the War of 1812 he was devastated by America's loss in the war and was suffering from a serious injury in his shoulder that he got from a British bullet. The young Dana, whose family had lost everything in the war, decided to move out of New Hampshire and head west. When he arrived in Indiana, he dropped his last name, some say to remove association with his now impoverished family, to symbolically begin anew in a new land, or both.
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Robert Edward Lee (January 19, 1807-January 2, 1858), Republican President of the United States of America from 1853-1858. ITTL he never grew his distinctive beard, and IITL his mustache becomes distinctive.
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Josiah Black (March 6, 1824-October 19, 1888), leader of the short-lived New African Republic and first African-American governor of Mississippi and of any US state. IOTL this was a photo of an unknown African-American man from Natchez, Mississippi.
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General Jason Pollard Gaines (September 22, 1795-December 9, 1872), in civilian clothing. IOTL he was named John Pollard Gaines and was a Whig Congressman from Kentucky and a Territorial Governor of Oregon.
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James Hawthorne (March 12, 1819-October 20, 1903), Republican President of the United States of America from 1858 to 1862 and the last President of the Slaver Union/Old Union. IOTL Hawthrone was a physician and politician in the states of California and Oregon.
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General Peter Matthews (1812-June 28, 1870), in civilian clothing. IOTL he was named Joseph Warren Matthews and was a Governor of Mississippi.
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Ronald Frederick Jackson (September 11, 1813-December 27, 1896), military man, Governor of Pennsylvania and Democratic nominee for President in the 1858 election. IOTL he was named Conrad Feger Jackson.
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Giles Brandon (September 15, 1788-March 24, 1858), Republican President of the United States of America from 1837 to 1841. IOTL he was named and Gerard Brandon and was a Governor of Mississippi.
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Victor Joseph Yates (November 9, 1768-September 1, 1852), Governor of Pennsylvania and Democratic President of the United States of America from 1841 to 1847. IOTL he was named Joseph Christopher Yates and was a Governor of New York. ITTL he moved to Pennsylvania as a result of the aftereffects of the War of 1812. At 72, he is so far the oldest man to be elected President of the United States of America.