Sorry if this is a silly question, I was just wondering if there were notes or journals showing that not all the slave owners worked them to dust.
There is no such thing as 'fair' slavery. African American slaves were human beings treated, bought and sold as property.
/u/Freedmenspatrol and /u/Sowser have discussed the concept of 'nice' slave-ownership in great detail in their respective pieces:
Whilst slavery was happening in the US, how common was it for families to treat their slaves very well? /u/Freedmenspatrol
Suffering slaves and suffering serfs, whats the diff? - /u/sowser