looks like one of those Yankee slave ships from Nantucket. These are the ones that brought the slaves in, not the Stars and Bars No, thats an image of the slave deck on the Brookes , an English slaver circa 1802. It was built to hold about 450 slaves in chains, but would often sail with many more, in the conditions I described above.
The Yankees you refer to made that image widely known as part of their abolition efforts, which might be why you don't recognize it.
I know I can read the caption on the image.
One of the worst things the slave ships used to do was keep the entire human cargo attached to one chain. They would run this to one of the ships anchors and have a cut out in the hull. If they were being chased by a ship intent on enforcing the anti slave laws they would drop the anchor pulling the entire cargo out with it into the ocean. Nice folks.
Bulley Hayes was one of the most notorious of the American slave traders. The entire system from the time they were captured until they finally made it was brutal and inhuman beyond belief.