"Hello! Glad to see you." The investigator greeted him with a hand-shake. "Do you know that your office staff is also here?"

"Danny?" said Bat. "No, is he? What's the idea?"

"Came to make a report, I suppose. Didn't you get my note saying I had borrowed him for a while?"

"Oh, yes," said Bat. "That's so."

He followed the other into the study, and there they saw Danny, his red hair glowing under the lights and deep in the pages of some illustrated papers. But he got up and stood looking at his employer with a grin.

"Hello, Mr. Scanlon," said he. "I hope you ain't mad or nothin' for my going away and leaving the office."

"I've explained all that, Danny," said Ashton-Kirk, and Bat nodded good-humoredly. "And now let's hear what you have to tell."

"I tried to get you on the telephone an hour ago," said Danny, as they all three sat down at the table. "Maybe it was longer than that. But Mr. Stumph said you wasn't in, and then I told him I was coming around to wait till you got here."

"Quite right," smiled the crime specialist, approvingly.

"When we left the office," Danny told Scanlon, "we took a taxi. And we went to the Chandler Building. And up on the sixteenth floor we went into an office which was empty. Mr. Ashton-Kirk told me I was to stay there and was to watch things that happened in the place across the hall."