From the Greek scholé , leisure , free time , study center , school and arché , principle, origin, authority , power : Diadochus , director of the Greek philosophical schools , guarantor of his line of thought after his foundation . The first scholar of the Academy at Plato's death was his nephew Speusippus, at the Lyceum, Theophrasthus, in the Garden, Hermarcus of Mytilene and at the Stoa, Cleantes.