THE UNSEEN WORLD 
265 
institution. The series of mice-like and rat-like creatures, 
moles, voles, squirrels and others, arboreal, terrestrial 
and aquatic, which they had amassed, was a revelation 
to us of the infinite variety of this unseen world on the 
minor scale. 
WHITE-BEARDED GNU. 
Outside span of horns, 28| ins. 
