Mitchel became mayor at age thirty-four and made Bruère his chief adviser

Evidence

Having finally accepted the Fusion nomination, John Purroy Mitchel had been elected mayor on November 4, 1913, at the age of thirty-four. Bruère had become his closest confidant, the expert who provided the tinder to fuel Mitchel’s zeal; Bruère provided the facts and theories, Allen was to say, and “Mitchel took fire” with them. Now, as mayor, Mitchel made Bruère City Chamberlain. — Robert A. Caro, The Power Broker, 295