who turned it into the Oregon and California Railroad Company. By the mid-1870s, Elliott appears to have retired permanently to Massachusetts, where he died of heart disease on September 19, 1897. Battlefield maps Elliott is remembered for his detailed maps of two Civil War battlefields. While in Washington in the spring of 1864, pursuing his case to Congress, he produced at least two detailed surveys of the Gettysburg and Antietam battlefields. While the full story of how he became involved in this project is unknown, it is likely that he was given access to original surveys of temporary burial sites undertaken by officials at the times of the battles (Gettysburg in July 1863, and Antietam in September 1862). His maps reflect and appear to draw heavily on the eyewitness work done by local officials and community members (such as David Wills of Gettysburg, who had commissioned a survey of burial locations within two weeks of the battle). The Gettysburg map, published in 1864 by "S.G. Elliott," shows the location of 8,352 individual burial locations and 345 dead horses. However, it only identifies seventeen of the graves by name. The Antietam map shows 5,800 graves, including the names of 45 deceased soldiers (although it does include some minor errors). The increased detail for the latter map may be a result of the fact that, although the Battle of Antietam took place a year before Gettysburg, its dead were not interred in a permanent cemetery until 1864, after the publication of Elliott's map. The maps were published by H.H. Lloyd, a New York publisher and bookseller, sometime in June 1864, and are known to have been sold at the 1864 Sanitary Fair in Philadelphia, as well as by H.H. Lloyd at their premises in New York. Few copies of the maps are known to survive today, but they have both been digitized (the Antietam map by the New York Public Library and the Gettysburg map by the Library of Congress). The American Battlefield Trust uses Elliott's map of Gettysburg to inform its conservation activities in the Gettysburg area. External links Map of central California : showing the different railroad lines completed & projected (1860), via Stanford Libraries Research file on Simon G. Elliott, 1950-1952, compiled by Stanford librarian Jeannette M. Hancock Map of the battlefield of Gettysburg (1864), via the Library of Congress Map of the battlefield of Antietam (1864), via the