Half an hour later the door of Dr. Bird's laboratory opened suddenly to admit Bolton.
"Hello, Doctor," exclaimed the Chief, "what the dickens have you got on your mind now? I ought to skin Carnes alive for talking out of turn, but if you really have an idea, I'll forgive him. What do you suspect?"
"I suspect several things, Bolton, but I haven't time to tell you what they are. I want to get quietly into the White House as promptly as possible."
"That's easy," replied Bolton, "but first I want to know what the object of the visit is."
"The object is to see what I can find out. My ideas are entirely too nebulous to attempt to lay them out before you just now. You've never worked directly with me on a case before, but Carnes can tell you that I have my own methods of working and that I won't spill my ideas until I have something more definite to go on than I have at present."
"The Doctor is right, Chief," said Carnes. "He has an idea all right, but wild horses won't drag it out of him until he's ready to talk. You'll have to take him on faith, as I always do."
Bolton hesitated a moment and then shrugged his shoulders.
"Have it your own way, Doctor," he said. "Your reputation, both as a scientist and as an unraveller of tangled skeins, is too good for me to boggle about your methods. Tell me what you want and I'll try to get it."