George, I don't believe so if you are referring to the reason why the Confederate cannons were found at the Pee Dee River in or close to Horry County, South Carolina. There is much on the internet like this one.
For 20 years, amateur diver Bob Butler searched the murky waters of the Pee Dee River for cannons he knew had been jettisoned from a Confederate warship shortly before it was scuttled in advance of surging Union troops at the end of the Civil War
He found one in 1995 as he dove near U.S. 301 on the Florence-Marion county line. He discovered another in 2006. He was on hand seven years later as a member of the Pee Dee Research and Recovery Team when the third cannon was located.
On Tuesday, Butler watched with quiet satisfaction as a team from the University of South Carolina raised the cannons from the muddy bottom of the river, some of the final remnants of Union Gen. William Sherman’s march through the Carolinas in 1865.
"We brought a little bit of South Carolina history to the surface today," Butler said. "This closed the book on a lot of history. It's really special."
Read more here: https://www.thestate.com/news/local/article36910053.html#storylink=cpy
From the photographs from the Pee Dee cannons located they do appear to me as though they are 10" Columbiad cannons. However it appears that the State of South Carolina took custody of them. So how does an abandoned trailer with a 10" Rodman Columbiad cannon end up on State Route 707 in Horry County, South Carolina? I don't know the answer to that. Eric Rolle who took custody of the trailer and 10" Columbiad cannon that was abandoned on the shoulder said the cannon had C.S.S. on it. Perhaps there were many 10" Columbiad cannons dumped into the Pee Dee River? Whoever abandoned that trailer in my opinion did not have heavy equipment to raise the cannon. How they had temporary custody of it is any ones guess.