After looking at the house Crewe walked back to the cab-stand at Hyde Park Corner. He had arrived at the conclusion that it was necessary to settle beyond doubt whether the K.C. had visited Riversbrook the night Sir Horace had returned from Scotland. If the K.C. had done so, he was anxious to keep the visit secret, for not only had he not informed the police of his visit but he had kept it from Miss Fewbanks. Crewe had ascertained from Miss Fewbanks that Mr. Holymead when he had called at Riversbrook on a visit of condolence had not mentioned to her anything about having left his stick in the hall stand on a previous visit. On leaving Miss Fewbanks Mr. Holymead had gone up to the hall stand and taken both his hat and stick as if he had left them both there a few minutes before.
Crewe reasoned that if Holymead had gone out to see Sir Horace Fewbanks at Riversbrook and had desired to keep his visit a secret he would not have taken a cab at Hyde Park Corner to Hampstead, but would have travelled by underground railway or omnibus. In all probability the Tube had been used because of its speed being more in harmony with the feelings of a man impatient to get done with a subject so important that Sir Horace had been recalled from Scotland to deal with it. He would leave the Tube at Hampstead and take a taxi-cab. He would not be likely to go straight to Riversbrook in the taxi-cab, if he were anxious that his movements should not be traced subsequently. He would dismiss the taxi-cab at one of the hotels bordering on Hampstead Heath, for they were the resort of hundreds of visitors on summer nights, and his actions would thus easily escape notice. From the hotel he would walk across to Riversbrook. But the return journey would be made in a somewhat different way. If Holymead left Riversbrook in a state of excitement he would walk a long way without being conscious of the exertion. He would want to be alone with his own thoughts. Gradually he would cool down, and becoming conscious of his surroundings would make his way home. Again he would use the Tube, for it would be more difficult for his movements to be traced if he mixed with a crowd of travellers than if he took a cab to his home. It was impossible to say what station he got in at, for that would depend on how far he walked before he cooled down, but he would be sure to get out at Hyde Park Corner because that was the station nearest to his house. Allowing for a temperamental reaction during a train journey of about twenty minutes, he would feel depressed and weary and would probably take a taxi-cab outside Hyde Park station to his home. That was a thing he would often be in the habit of doing when returning late at night from the theatre or elsewhere, and therefore could be easily explained by him if the police happened to make inquiries as to his movements.
As Crewe anticipated, he had no difficulty in finding the driver of the taxi-cab in which Holymead had driven home on the night of Wednesday last. The K.C. frequently used cabs, and he was well-known to all the drivers on the rank. Crewe got into the cab he had used and ordered the man to drive him to his office, and there invited him upstairs. He adopted this course because he knew that the driver, who gave his name as Taylor, would be more likely to talk freely in an office where he could not be overheard than he would do on the cab-rank with his fellow-drivers crowding him, or in an hotel parlour where other people were present.
"Tell me exactly what happened when you drove Mr. Holymead home on Wednesday night," said Crewe. "Did you notice anything strange about him, or was his manner much the same as on other occasions that he used your cab?"
"Well, I don't see whether I should tell you whether he was or whether he wasn't," replied the taxi-cab driver, who was as surly as most of his class. "What's it to do with you, anyway? He's a regular customer of mine on the rank, and he's not one of your tuppenny tipsters, either. He's a gentleman. And if he got to know that I had been telling tales about him it would not do me any good."
"It would not," replied Crewe, with cordial acquiescence. "Therefore, Taylor, I give you my word of honour not to mention anything you tell me. Furthermore, I'll see that you don't lose by it now or at any other time. I cannot say more than that, but that's a great deal more than the police would say. Now, would you sooner tell me or tell the police? Here's a sovereign to start with, and if you have an interesting story to tell you'll have another one before you leave."
The appeal of money and the conviction that the police would use less considerate methods if Crewe passed him over to them abolished Taylor's scruples about discussing a fare, and it was in a much less surly tone that he responded:
"I didn't notice anything strange about him when he called me off the rank, but I did afterwards. First of all, I didn't drive him home. That is, I did drive him home, but he didn't go inside. When I drew up outside his house in Princes Gate, I looked around expecting to see him get out. As he didn't move I got down and opened the door. 'Aren't you getting out here, sir?' I said, in a soft voice. 'No,' he said. 'Drive on.' 'This is your house, sir,' I ventured to say. 'I'm not going in,' he replied, 'drive on.' I was surprised. I thought he was the worse for drink, and I'd never seen him that way before. But some gentlemen are so obstinate in liquor that you can't get them to do anything except the opposite of what you ask them. I thought I'd try and coax him. 'Better go inside, sir,' I said. 'You'll be better off in bed.' 'Do you think I am drunk?' he said sharply. You could have knocked me down with a feather. He was as sober as a judge, all in a moment. 'No, sir, I didn't,' I said. 'I wouldn't take the liberty,' I said. 'Then get back on your seat and drive me to the Hyde Park Hotel—no, I think I'll go to Verney's. But don't go there direct. Drive me round the Park first. I feel I want a breath of cool air.'"
"Go on," said Crewe, in a tone which indicated approval of Taylor's method of telling his story.
"Well, I turned the cab round and drove through the Park. But I was puzzled about him and looked back at him once or twice pretending that I was looking to see if a cab or car was coming up behind. And as we passed over the Serpentine Bridge I saw him throw something out of the window."