To realize fully what such a relapse may mean, read what Galton says
(123) of the Hottentots. They have
"that peculiar set of features which is so characteristic of
bad characters in England, and so general among prisoners
that it is usually, I believe, known by the name of the
'felon-face;' I mean that they have prominent cheek-bones,
bullet-shaped head, cowering but restless eyes, and heavy
sensual lips, and added to this a shackling dress and
manner."
Of the Damaras Galton says (99) that "their features are often
beautifully chiselled, though the expression in them is always coarse
and disagreeable." And to quote Mungo Park on the Moors once more
(158):
"I fancied that I discovered in the features of most of them
a disposition toward cruelty and low cunning.... From the
staring wildness of their eyes, a stranger would immediately
set them down as a nation of lunatics. The treachery and
malevolence of their character are manifested in their
plundering excursions against the negro villages."