"Edgeworth lacked the force that produces impressive treatises and assembles adherents; amiable and generous, he never asserted himself in any claims of his own, he was over-sensitive on the one hand, overmodest on the other; he was content to take a backseat behind Marshall whom he exalted into Achilles; hesitating in conversation, absent-minded to a pathological degree, the worst speaker and lecturer imaginable, he was personally ineffective -- unleadedy is, I think, the word."