was unlocked, and when Mr. Applegate opened it the boys saw that a flight of stairs lay beyond.
"There you are. Those stairs lead up into the tower. Search away. You won't find anything."
"I hope we do, Mr. Applegate," said Frank. "And I'm pretty sure we shall."
"Yes—boys are always goin' to do wonders. Go ahead. Live and learn. Waste your time."
And with this parting shot, Hurd Applegate turned and hobbled back along the corridor, the sheet of stamps still in his gnarled hand. He was muttering to himself as he departed. The Hardy boys looked at one another.
"Not very encouraging, is he, Frank?"
"Not a bit of it. But it will be so much the better for us if we get the stuff back for him. He won't think we were wasting our time then."
"Let's get up into the tower. I'm anxious to start."
The tower was about five stories in height as compared with the rest of the mansion, which had but three stories. The lower floor was empty. The floors and walls were heavy with dust. Frank and Joe first examined the stairs carefully for footprints, but there were none to be seen.
"That seems queer," remarked Frank. "If Jackley had been in here within the past month
