They sat on for some time longer smoking and chatting. In spite of his years Mr Clayton’s mind remained active and vigorous, and he had kept himself well abreast of recent events. He evidently enjoyed exchanging ideas with the Inspector, and the latter exerted himself to entertain the old gentleman, relating several of the adventures he had met with in his professional career.

In the afternoon Tanner called at the Eagle Works. But there he got no help. The firm’s official records did not go back far enough to include the Dales’ names, and none of the office staff recalled the brothers’ affairs.

On the following day the Inspector and Mr Clayton travelled up to town together, and the former saw his new friend to an hotel. The interview with Douglas was to take place next morning.

Inspector Tanner delighted in a dramatic situation, especially when he was the deus ex machina. In the present instance he thought he was sufficiently sure of his ground to risk an audience. After consulting his chief, he accordingly rang up James Daunt.

‘I think I am on to a clue at last,’ he said. ‘As you and Miss Drew are interested and have helped so much I will stretch a point from strict etiquette and invite you both to be present while we test it tomorrow.… Yes, here at the Yard at eleven o’clock.’

At the time appointed a little group sat in the Inspector’s room. There was first of all Miss Drew, dressed quietly in a navy blue coat and skirt, and a small hat. Her kindly, dependable face was pale and somewhat drawn, as if the strain of the last few weeks had taken its toll of her. But she was calm and pleasantly courteous as usual, and did not betray by word or deed the anxiety which was gnawing at her heart.

Jimmy Daunt, who sat beside her, seemed the more nervous of the two. He was extremely dissatisfied at the way his case was going, and eagerly anxious to learn in what direction the Inspector’s fresh information would tend.

Mr Clayton, who sat next to Daunt, was anxious too. He devoutly hoped that after all the fuss and trouble of his visit to London, he should be able to give a decided opinion—to say definitely whether the man he was to see was or was not Dale.

On the other side of Tanner sat Chief Inspector Edgar. On Tanner reporting what he proposed to do, the latter had expressed a desire to be present. He it was who had suggested having the meeting at the Yard, in order to avoid the necessity of Miss Drew’s visiting the prison. But he took no part in the proceedings, Tanner conducting all the business.

When the visitors had been introduced to each other, Tanner rose, and bowing to Miss Drew and her cousin, said: