the succession has been variously
explained; he is said to have been lacking in respect and gratitude to
the master; Plato is said to have remarked of him that he needed the
curb as much as Xenocrates needed the spur. The facts really need no
explanation. The original genius is never sufficiently subordinate and
amenable to discipline. He is apt to be critical, to startle his
easy-going companions with new and seemingly heterodox views, he is the
'ugly duckling' whom all the virtuous and commonplace brood must cackle
{174} at. The Academy, when its great master died, was no place for
Aristotle. He retired to Atarneus, a city of Mysia opposite to Lesbos,
where a friend named Hermias was tyrant, and there he married Hermias'
niece. After staying at Atarneus some three years he was invited by
Philip, now king of Macedon, to undertake the instruction of his son
Alexander, the future conqueror, who was then thirteen years old. He
remained with Alexander for eight years, though of course he could
hardly be regarded as Alexander's tutor during all that time, since
Alexander at a very early age was called to take a part in public
affairs. However a strong friendship was formed between the
philosopher and the young prince, and in after years Alexander loaded
his former master with benefits. Even while on his march of conquest
through Asia he did not forget him, but sent him from every country
through which he passed specimens which might help him in his projected
History of Animals, as well as an enormous sum of money to aid him in
his investigations.

After the death of Philip, Aristotle returned to Athens, and opened a
school of philosophy on his own account in the Lyceum. Here some
authorities tell us he lectured to his pupils while he paced up and
down before them; hence the epithet applied to the school, the
_Peripatetics_. Probably, however, the name is derived from the
'Peripati' or covered {175} walks in the neighbourhood of that temple
in which he taught. He devoted his mornings to lectures of a more
philosophical and technical character; to these only the abler and more
advanced students were admitted. In the afternoons he lectured on
subjects of a more popular kind--rhetoric, the art of politics,
etc.--to larger audiences. Corresponding with this division, he also
was in the habit of classifying his writings as Acroatic or technical,
and Exoteric or popular. He accumulated a large library and museum, to