Stephen, see below from Forrest's report in the O.R. See especially paragraphs 2 and 5. Stan

"Fortunately for those of the enemy who survived this short but desperate struggle, some of our men cut the halyards, and the United States flag, floating from a tall mast in the center of the fort, came down. The forces stationed in the rear of the fort could see the flag, but were too far under the bluff to see the fort, and when the flag descended they ceased firing. But for this, so near were they to the enemy that few, if any, would have survived unhurt another volley.

As it was, many rushed into the river and were drowned, and the actual loss of life will perhaps never be known, as there were quite a number of refugee citizens in the fort, many of whom were drowned and several killed in the retreat from the fort.

In less than twenty minutes from the time the bugles sounded the charge firing had ceased and the work was done. One of the Parrott guns was turned on the gun-boat. She steamed off without replying. She had, as I afterward understood, expended all her ammunition, and was therefore powerless in affording the Federal garrison the aid and protection they doubtless expected of her when they retreated toward the river. Details were made, consisting of the captured Federals and negroes, in charge of their own officers, to collect together and bury the dead, which work continued until dark.

I also directed Captain Anderson to procure a skiff and take with him Captain Young, a captured Federal officer, and deliver to Captain Marshall, of the gun-boat, the message, copy of which is appended and numbered 5.

All the boats and skiffs having been taken off by citizens escaping from the fort during the engagement, the message could not be delivered, although every effort was made to induce Captain Marshall to send his boat ashore by raising a white flag, with which Captain Young walked up and down the river in vain signaling her to come in or send out a boat.

She finally moved off and disappeared around the bend above the fort. General Chalmers withdrew his forces from the fort before dark and encamped a few miles east of it."