midnight
What was the secret of Phantom Mountain ? What did Mr. Jenks really want ? Could he make diamonds ? Tom asked himself these questions as he hastily dressed to go down to his midnight visitor . `` Well , Mr. Jenks , '' began Tom , when he had descended to the garden , and greeted the man who had acted so strangely on Earthquake Island , `` this is rather an odd time for a visit . '' `` I realize that , Tom Swift , '' was the answer , and the lad noticed that the man spoke much more calmly than he had that evening at the jewelry shop . `` I realize that , but I have to be cautious in my movements . ''