This is from his "African Notebooks" from 1939 „Once when I had a jovial elderly patient in the Hospital, a native came and asked me if i would not like to have him for my own. He was willing to give him to me as a laborer on the understanding that i should give him his food but not pay him any wages. To my astonished questions, he replied that he had inherited the man as a slave from his father and found him fairly handy and not specially lazy. But he was up to all sorts of tricks. According to the law in force among the Africans, the master was responsible for all his slave did. He had often offered him his freedoms, but he refused to accept it, because then he would have to pay the penalty for his misdoings himself. That was why he was offering to give him to me. I should be able to manage him. Unfortunately I was obliged to reply that I too was not rich enough to possess so expensive a slave.“ lol