"That also sounds a good argument," said Quarles, "but is it? He could not deny that he and his wife quarreled rather badly at times, but he wanted to justify his position, and he felt confident the opinion of the doctors would stand, no matter what he might say. If no other facts come to light, suicide will be the line of defense, Wigan, and it will be exceedingly hard to get any judge and jury to convict him. Nothing carries greater weight than medical evidence, and you will find the doctors sticking to their opinion no matter what happens. No, Wigan, your reasons do not prove that he is not an exceedingly clever and calculating rascal. On the present evidence I think he would escape the hangman, but the public will continue to think him guilty unless some one else stands in the dock in his place."
"I wonder whether the Folliotts have told the truth," said Zena.
"Intuition, Wigan," laughed Quarles, "jumps to the end of the journey and wants to argue backwards."
"Do you not often do the same, dear?"
"Perhaps, but not this time. I think you said the taxi had been in charge of the police?"
"Yes," I answered.
"I should like to see it."
"We can go to-morrow."
I had already spent a couple of hours with that taxi, and I was rather anxious to see how Quarles would go to work with it.
He began with the metal work and the lamps, nodded his admiration at the way they were kept, and remarked that but for the vehicle number and the registering machine it might be a private car. He examined the engine and the tires, using his lens; seemed to be particularly interested in the texture of the rubber, and picked out some grains of soil which had stuck in the tire. All four tires came in for this close inspection.
Inside the taxi his lens went slowly over every inch of the upholstering, and with the blade of a penknife he sc.r.a.ped up some soil from the carpet. This he put on a piece of white paper and spent a long time investigating it. He opened and shut the door half a dozen times, and shook his head. Then he seated himself in the driver"s seat, and in pantomime drove the car for a few moments. Afterwards, he stood back and regarded the car as a whole.
"Well, Wigan, it is a very good taxi; let us go and have a ride in another one."
He did not hail the first we encountered, and when he did call one it was for the sake of the driver, I fancy. He explained that he wanted to drive to Richmond Green by Hammersmith and Kew Bridge.
"And we don"t want to go too fast," said Quarles.
"Don"t you be afraid, guv"nor, I shan"t run you into anything; you won"t come to no harm with me."
"It isn"t that," said Quarles, "but I"m out to enjoy myself. I"ll add a good bit to what that clock thing says at the end of the run."
"Thank you, guv"nor."
"Now just get down and open this thing to let me have a look at the works."
The driver looked at me, and I nodded. No doubt he thought I was the old man"s keeper.
Quarles looked at the engine.
"It isn"t new," he remarked.
"No, guv"nor."
"How long has it been running?"
"I couldn"t say. I"m not buying this on the hire system."
"You fellows do that sometimes, eh?"
"Yes, guv"nor, there are several of us chaps own their own taxi."
"That"s good. Now for Richmond, and go slowly from Hyde Park Corner."
I never remember a more tedious journey. Quarles hardly spoke a word the whole way, but sat leaning forward, looking keenly from one side of the road to the other, as if he were bent on obtaining a mental picture of every yard of the way. Arriving at Richmond Green he did no more than just glance at the house where Sir John had dined that night, and then told the man to drive to Twickenham as fast as he liked to go.
"Stop him when we reach Tavener"s house, Wigan. You know it, I suppose?"
I did, and stopped the driver when we got there. Quarles had the car turned round, then he got out and examined the tires with his lenses. The driver winked at me, and I nodded to a.s.sure him that I knew the eccentric gentleman I had to deal with, and that he was quite harmless.
We then drove back to Richmond rapidly, and from there went toward town, but more slowly. By Kew Gardens along to Kew Bridge Quarles did not seem particularly interested in the journey, but as we drew near Hammersmith he became alert again.
We were going slowly past St. Paul"s school when he told the driver to take the second turning to the left. It was a narrow street, a big warehouse, which was being enlarged, on one side, and a coal yard on the other. About fifty yards down this street, the driver was instructed to stop.
"We will get out for a minute and look at the view," said Quarles facetiously.
I confess I found nothing whatever to interest me, but Quarles seemed to find the blank walls of the warehouse and coal yard attractive.
"Now, driver, you can turn round and get us back to Hyde Park Corner as quickly as you like," said the professor as we got into the taxi again.
Arriving at our destination he told the driver to go into the park, and there stopped him. Again he examined the tires and the texture of them, picking some soil from the rubber, and he sc.r.a.ped up some dust from the floor of the taxi with a penknife and put it in an envelope.
"Thank you, my man," he said, paying a substantial fare.
"You"re welcome, guv"nor," said the driver with a grin.
"He is fully persuaded that he has been driving a lunatic and his keeper," Quarles said as he walked away. "I suppose you can find the driver of the other taxi, Wigan."
"We might have found him this morning. He lives at Twickenham."
"I want you to see him and ask him two questions. First, was the fog in Hammersmith, or elsewhere on the journey, thick enough to bring him to a standstill before he reached Hyde Park Corner? Secondly, is he quite sure that the man who opened the door and called to him had not just got out of the taxi?"
"But--"
"You ask him these two questions and get him to answer definitely," said Quarles in that aggravating and dictatorial manner he sometimes has.
"To-morrow night come to Chelsea. I am not prepared to talk any more about the Tavener case until then."
Without another word he went off in the direction of Victoria, leaving an angry man behind him. I am afraid I swore. However, I hunted up the driver of the taxi, and went to Chelsea the following night, still somewhat out of temper.
Quarles and Zena were already in the empty room waiting for me.
"Well, what did the man say?" asked the professor.
"The fog did not stop him anywhere until he got to Hyde Park Corner, and he is sure Lady Tavener was alone after leaving Richmond."
"He stuck to that?"
"He did, but after some consideration he said that he had almost come to a standstill in Hammersmith Broadway on account of the trams. I suggested that some one might have got into the taxi then, but while admitting the bare possibility, he did not think it likely."
"Did he give you the impression that he believed Tavener guilty?"