I have a copy of the book "CAMP SUMTER The Pictorial History of Andersonville Prison by Ken Drew, Chief Historian of the City of Andersonville. Page 21 has these entries: August 11, 1864: Panic strikes as part of the west wall near the prison creek washes away during a storm. Brigadier General and Post Commander John H. Winder ordering guards to man the gap to prevent the 33,000 inmates from escaping, and telegraphs Adjutant General Samuel Cooper in Richmond to send no more prisoners of war. August 13, 1864: A new source of fresh water for the prisoners gushes from the groundinside the stockade near the recently washed away 100 foot portion of the west wall, saving hundreds of lives and believed by many to be an act of Divine Providence; thus the name given by the inmates, Providence Spring.