John Slyder bought the 75 acres, south of Gettysburg, in 1849. His wife’s sister was Lydia Leister whose farm George Meade used as his headquarters during the battle. The Slyder farm was in the path of Law’s Alabamians during the second day advance by Longstreet’s Corps. It was near Plum Run where the 15th Alabama came under fire by sharpshooters. The regiment turned to face them than advanced up Big Round Top instead of during with the rest of the brigade. Order from Big Round Top to find the flank of the Union army on Little Round Top, while the 47th Alabama attacked the center of the 20th Maine, the 15th Alabama went to their right and turned to come in on the flank of the men from Maine. Joshua Lawrence Chamberlain’s quick action to extend his line saved his regiment and protected the flank of the rest of Vincent’s Brigade.
My novel, Courage on Little Round Top, goes into detail about the 15th Alabama, as well as the 20th Maine, and the events that brought both of them to the bloody slope of Little Round Top.