A battery lamp! The round spot of light worked along the cement floor, vanished occasionally, reappeared, and then vanished altogether.
Somebody was down there hunting for something.

What?
Kitty remained with her head out of the window for some time, unmindful of the spatter of rain.

But nothing happened.

The man was gone.

Of course the incident might not have the slightest bearing upon the previous adventures of this amazing night; still, it was suggestive.