*fully. Finally he produced an awl, a screwdriver

and some screws from different pockets and proceeded to attach the square of tin to the middle panel. The conspirators watched with vast curiosity. There was printing on the tin, but not until the man had completed his task and gone were they able to read it. Then they stole out and regarded the sign interestedly. This is what they saw:

They viewed each other questioningly and doubtfully.

"Civil Engineer," mused Fudge. "That's a funny game. Of course, that isn't his real name."

"Let's get out of here," said Perry uneasily. "He might come back."

They went down the stairs and emerged on the sidewalk after Fudge had peered cautiously from the doorway. "I suppose," muttered Fudge, "we oughtn't to be seen together. He may be watching from across the street somewhere." He viewed