Posters such as freddo are correct in saying that the word was still in common use as the word for dark people right up to fairly recent times.
As a youngster I had a distant relative who had a black labrador . The dog's name was N***** . Nobody thought anything of it at the time. When I worked as a teenager in a decorating supplies shop a major paint company had a colour of paint called N***** Brown.
Times change. We cannot judge them then by the standards of today