If there was anything that size in Texas, which I don’t believe there was, it wasn’t anywhere near me.
The Trinity river couldn’t handle large boats, and it would take a large boat to handle something that size, so I doubt it was fired from a boat.
Just to get over the banks of the river and the trees you would have to fire it almost straight up from a boat on the river. I found it almost 3 miles from the river, so I don’t think it came from a boat on the river.
I doubt seriously they would commit a canon that size for small river boats they would use a smaller canon they could move.
I’ve wondered if the one leg Mexican Santa Anna had anything that size.
Both GingisK and I said that the large cannons we mentioned were LAND based. The cannon that GingisK mentioned was used in "shore batteries", meaning it was on land and used AGAINST boats, not ON boats.