Martov is twenty-two, a Russian Jew born in Constantinople. He is, in the words of one leftist sparring partner, ‘a rather charming type of bohemian … by predilection a haunter of cafés, indifferent to comfort, perpetually arguing and a bit of an eccentric’. Weak and bronchial, mercurial, talkative but a hopeless orator, not much better as an organiser, affecting, in these early days, a worker’s get-up, Martov is every inch the absent-minded intellectual.