Appearently there were more Parrot Guns floating around in Arkansas in 1862 than just the ones from Pikes command.

I found this in the Naval OR's Series 1, Vol 23, page 171;

U.S. FLAG-STEAMER BENTON,
Memphis, June 19, 1862.

SIR: The Conestoga, Lieutenant Commanding G. M. Blodgett, ar-
rived here to-day from White River.

She brings information of the capture of two batteries at St.
Charles, 80 miles from the mouth; the first of which mounted four
Parrott guns, and the second three 42-pounder rifled guns. These
guns, it is understood, were taken from the gunboat Marsposa
F Maurepas] , which, after being dismantled, was sunk. There is now
but one gunboat remaining in White River, the Pontchartrain,
mounting three or five guns, and having her machinery protected by
iron and cotton.

The enemy has attempted to block up the river by driving piles
and by sinking boats, but no serious obstructions have yet been en-
countered. .............

Again the Union Navy diagram of Fort Hindman clearly note the presence of a 3 inch parrot gun on the river side battery of the fort. Was that one of Hart's Battery three guns or was it from another source? Most of the Guns inside Fort Hindman had come from Fort Hindman at Deval's Bluff. The three heavy guns had come from the CSS Ponchartrain and had be at Deval's Bluff before being moved to Arkansas Post.