The physician was at home, and not engaged. So Dave and the driver carried Dan into the medical man's office.
"Too bad!" murmured the physician. "Intoxicated, eh?
"No, sir," responded Dave quietly, "and that's one of the things I wish you to note positively, so that you can be prepared to certify if necessary. This is the stuff, I believe, with which my friend was drugged."
Dave passed over the vial Tony had handed him. Dr. Stewart smelled the contents, then touched the bottle lightly to his tongue. Next he stepped over to a cabinet, poured a small quantity of the liquid into a test tube and did some hurried experimenting.
"The regulation knockout drops," he smiled grimly. "Now, help me to take off your friend's overcoat. Whew! There is the smell of alcohol here!
"Only on the overcoat, I guess, doctor," suggested Dave. "You don't notice any on my friend's breath, do you?
"No," replied the doctor.
"There has been a plot on foot to make it appear that my friend had been indulging in liquor. Doctor, I hope you can prove positively that such was not the case."
"I shall have to pump the young man's stomach out. That is the first step in getting him back to consciousness. That will also show convincingly whether he has been using alcoholic drinks."
Within three minutes Dr. Stewart was positive that Dan had not been using strong drink.