OK, I did. There were fewer than 80,000 slave holders in all the Union states. Where did the other 220,000 come from?
Not sure about those numbers given, but I do know that there were a significant number of Southern Unionists who fought in Lincoln’s armies. A number of these were slaveholders who felt that there was more security for slavery in the union.
When you rebut, you ought to post links to your source. I don't know how many Union Slave holders there were, but I know there were five Union Slave states where slaves were held.
Sounds to me your quibble is like that old joke.
"We've already determined what kind of girl you are, now we're just negotiating over the price."
From a moral perspective, do you really think the difference between 80,000 and 300,000 is significant? If the "Victor Version" of history were correct, the number should be ZERO!