Olive was unable to answer that question. The same thought had occurred to her. Now Mr. Presby began thumping the sides of the room with his cane. They understood his purpose and waited in breathless silence until he had gone all the way around the room.
"All sounds alike," he announced. "I didn't know but there might be another of those secret passages up here. I see, however, that it is not possible. Come, there is nothing to be gained by remaining here. Come, Mollie. Do not take it too much to heart," soothed Mr. Presby.
Mollie was now leaning against the wall with head buried in her arms, crying softly. The others had started for the stairway. A servant came up the stairs and announced that Ruth had telephoned from the Stevens place saying that Bob Stevens had gone to Brightwaters, and that she was going there to find him.
"Good gracious! What was that?" screamed Mrs. Presby, gripping her husband's arm with both hands as a mighty crash shook the building. A violent current of air smote them, another cloud of suffocating dust filled the air.
"Mollie's gone, too!" screamed Grace Carter.
CHAPTER XIV
TOMMY TAKES A WILD RIDE
FOR a moment the little group stood regarding one another in horror-stricken silence, then by common consent they all made for the stairway. Mr. Presby was half carrying, half dragging his wife, who was in a state of collapse. All had lost their heads completely. They did not know at what moment that terrible mysterious force might whisk them all out of existence. Instead of remaining calmly to solve the reason for Mollie's disappearance before their very eyes, all hands were fleeing from the scene of the double disaster. Mollie had not even cried out. She had simply gone, followed by that mighty crash. That was all they knew about it.