Okay, so there aren't primary sources. That's totally fine, though at this point, it's moot to speak about the relative ability for a traditional culture to cope with elevated mortality since we've moved into dealing with conjecture purely in slave economies created by conquerors and entirely subaltern peoples.

Just curious, earlier you stated that you spent "a lot of [your] mental life in the 17th century", where does that reach extend to? Is it just Portugal or is it specific to the Atlantic Slave Trade?