As indicated by the McKissacks, many of the variations in these four versions concern Prince Bumpo. His first appearance in this novel is the same in 1922/1950 (p. 148) AND in 2001 (p. 138-9):

"The Doctor had no sooner gone below to stow away his note-books than another visitor appeared upon the gang-plank. This was a most extraordinary-looking black man. The only other negroes I had seen had been in circuses, where they wore feathers and bone necklaces and things like that. But this one was dressed in a fashionable frock coat with an enormous bright red cravat. On his head was a straw hat with a gay band; and over this he held a large green umbrella. He was very smart in every respect except his feet. He wore no shoes or socks."

In 1988 (p. 128), this is abridged to:

"The Doctor had no sooner gone below to stow away his note-books than another visitor appeared upon the gang-plank. This was a black man, very fashionably dressed"

In 1998 (p. 109), it reads:

"The Doctor had no sooner gone below to stow away his note-books than another visitor appeared upon the gang-plank. This was a most extraordinary-looking black man. He was very smart in every respect except his feet. He wore no shoes or socks."

Next: OTHER EXAMPLES OF CHANGES PERTAINING TO SKIN COLOR