276 TRAVELS IN 
" the centre of the forehead was an excrescence of a hard 
" boney substance, covered with hah*, and resembhng the 
" rudiments of a horn ; the length of this with the hair was 
" ten inches." 
About the same time, Tjardt Van der Walt, of Olifants 
Kiver in Zwellendam, in company with his brother, saw, near 
the same place, an animal exactly of the shape of a horse, 
and somewhat larger than the quacha, that had longitudinal 
black stripes on a light ground ; it was grazing among a herd 
of elands. The two brothers having been some time without 
food, from their anxiety first to secure an eland, neglected 
the striped animal, intending afterwards to give chace to it ; 
but his gait was so wonderfully swift, that, bounding to- 
wards the mountains, he was presently out of their sight. 
Martinus Prinslo, of Bruyntjes Hoogte, when on a hunting 
excursion, saw behind the same mountain several wild horses, 
entirely different from either the quacha or the zebra, but 
they were so shy that they never could approach them suf- 
ficiently near to make minute distinctions ; they appeared to 
be of a light cinereous color, without stripes. This, how- 
ever, might be a deception of sight arising from distance, 
as dark stripes upon a light ground cannot be distinguished 
very far; they form a shade between the two colors, and the 
lighter tint is predominant ; as the primitive colors disposed 
in concentric circles on a card, and put in motion, will ap- 
pear white. The black and buff zebra, even when very near 
it, and especially if in motion, appears of a dull bluish ash 
coior, like the common ass. It is therefore probable, that 
