G. A. Johnston, An Introduction to Ethics, for Training Colleges… (1915)
“ The instinct of curiosity appears a little later in the life of the child than those which we have considered. The child's interest is excited by objects which are novel to it, but they must not be so strange as to startle it. The instinct of curiosity expresses itself first in the roving of the eyes, and later in the attempt to grasp the strange object with the hands. ”
