“Ah, call me not that,” he said, with a flourish of his fat hands, regaining immediately his portentous flippancy. “I would be known rather as the Brother of the Shadow.”

“I should have thought you could be only a very distant relation of anything so unsubstantial,” said Arthur, with a laugh.

Oliver’s face turned red with furious anger. His strange blue eyes grew cold with hatred, and he thrust out his scarlet lips till he had the ruthless expression of a Nero. The gibe at his obesity had caught him on the raw. Susie feared that he would make so insulting a reply that a quarrel must ensure.

“Well, really, if we want to go to the fair we must start,” she said quickly. “And Marie is dying to be rid of us.”

They got up, and clattered down the stairs into the street.

Chapter IV

They came down to the busy, narrow street which led into the Boulevard du Montparnasse. Electric trams passed through it with harsh ringing of bells, and people surged along the pavements.

The fair to which they were going was held at the Lion de Belfort, not more than a mile away, and Arthur hailed a cab. Susie told the driver where they wanted to be set down. She noticed that Haddo, who was waiting for them to start, put his hand on the horse’s neck. On a sudden, for no apparent reason, it began to tremble. The trembling passed through the body and down its limbs till it shook from head to foot as though it had the staggers. The coachman jumped off his box and held the wretched creature’s head. Margaret and Susie got out. It was a horribly painful sight. The horse seemed not to suffer from actual pain, but from an extraordinary fear. Though she knew not why, an idea came to Susie.

“Take your hand away, Mr Haddo,” she said sharply.

He smiled, and did as she bade him. At the same moment the trembling began to decrease, and in a moment the poor old cab-horse was in its usual state. It seemed a little frightened still, but otherwise recovered.