From the book, "True Tales of the South at War: How Soldiers Fought and Families Lived, 1861-1865", collected and edited by Clarence Poe.
"The man providing the account is a Confederate soldier named Bill Arp. Arp is not identified in the book at least here. He may be identified in some other place but I have not yet discovered if that is so"
On the sixth day of the Chickahominy fight, when McClellan was in full retreat, our brigade commander, General Anderson, sent me down to the river to General Lee’s headquarters for some instructions about moving the brigade. I found him in a large wall tent with many officers around him. This tent opened into another where the camp tables were set for dinner and the servant was bringing it in. There were four or five large camp tables joined together, and as I sat upon my horse waiting for a reply I saw a man, an officer, whose head and body were under the right hand table and his feet out upon the straw. His slouched hat was over the head and eyes; his sword was not unbuckled, and his boots were on and spurred. His Confederate gray clothes seemed faded and worn.
My curiosity was greatly excited, and when the adjutant handed me the instructions I ventured to point to the sleeping man and to ask, “Who is that?”
“That is Stonewall,” he said. “He has had no sleep for forty-eight hours, and fell down there exhausted. General Lee would not suffer him to be disturbed, and so our dinner will be eaten over him in silence.”
Reverently, I gazed upon him for a minute, for I felt almost like I was in the presence of some divinity….
Bill Arp, Confederate soldier