“I do.”
“But you are not able to assure us that no car was there?”
“Obviously, if a car was there, I should have seen it.”
“Oh, no, believe me, that’s far from obvious! If a car had been parked to the rear of the cottage on the little circular road, would you have seen it?”
“I should have seen its lights.”
“And if its lights had been turned out?”
“Then,” said Douglas Thorne slowly, “I should probably not have seen it.”
“You were not in the rear of the cottage at any time, were you?”
“No.”
“Then it is certain that you would not have seen it, isn’t it?”