Question: Who illustrated a children's book inspired by an unarmed scout and spy for the United States Army during the American Civil War?

The Battle of Fort Sumter (April 12–13, 1861) was the bombardment of Fort Sumter near Charleston, South Carolina by the Confederate States Army, and the return gunfire and subsequent surrender by the United States Army that started the American Civil War.  Following declarations of secession by seven Southern states, South Carolina demanded that the U.S. Army abandon its facilities in Charleston Harbor.  On December 26, 1860, Major Robert Anderson of the U.S. Army surreptitiously moved his small command from the vulnerable Fort Moultrie on Sullivan's Island to Fort Sumter, a substantial fortress built on an island controlling the entrance of Charleston Harbor.  An attempt by U.S. President James Buchanan to reinforce and resupply Anderson using the unarmed merchant ship "Star of the West" failed when it was fired upon by shore batteries on January 9, 1861.  South Carolina authorities then seized all Federal property in the Charleston area except for Fort Sumter. <SEP> Eric J. Wittenberg (born March 26, 1961) is an American Civil War (Civil War) historian, author, lecturer, tour guide and battlefield preservationist.  He is a practicing attorney in downtown Columbus, Ohio.  His published works have focused especially on the Civil War cavalryman and the cavalry battles of the Civil War, with emphasis on the Army of the Potomac's Cavalry Corps.  His first book, "Gettysburg's Forgotten Cavalry Actions", was chosen as the best new work addressing the Battle of Gettysburg in 1998, winning the Robert E. Lee Civil War Roundtable of Central New Jersey's Bachelder-Coddington Award.  The second edition of this book, published in 2011, won the U. S. Army Historical Foundation's Distinguished Writing Award for that year's best reprint.  In 2015, his book "The Devil's to Pay: John Buford at Gettysburg" won the Gettysburg Civil War Roundtable's 2015 Book Award.  He was a member of the Governor of Ohio’s Advisory Commission on the Sesquicentennial of the Civil War and has been active with several Civil War battlefield preservation organizations.  He and his wife Susan Skilken Wittenberg reside on the east side of Columbus, Ohio. <SEP>  Born into slavery, Tubman escaped and subsequently made some thirteen missions to rescue approximately seventy enslaved people, family and friends, using the network of antislavery activists and safe houses known as the Underground Railroad. Harriet Tubman (born Araminta Ross;  1822 March 10, 1913) was an American abolitionist, humanitarian, and an armed scout and spy for the United States Army during the American Civil War.  She later helped abolitionist John Brown recruit men for his raid on Harpers Ferry, and in the post-war era was an active participant in the struggle for women's suffrage. <SEP> The Railroad to Freedom: A Story of the Civil War is a children's book by Hildegarde Hoyt Swift.  The book, illustrated by James Daugherty, was first published in 1932 and was a Newbery Honor recipient in 1933.  It is a fictionalized biography of Araminta Ross (later known as Harriet Tubman) telling of her life in slavery and her work on the Underground Railroad.