Who is this person?

[RJNorton]

Hint #3: Regarding animals this man wrote:

"Animals have a higher degree of intelligence than we give them credit for. That intelligence is cultivated and developed whenever they are with persons who take pains to study and direct it. Nearly everybody who has had a pet dog, cat, bird, or other animal, is surprised by the discovery of capabilities, which lie imagines are peculiar to it. But every other similar animal would probably show the same, were the same care and attention given it."