He thought they were the lights of the motor, but as they passed he saw it was a cab taking someone to the railroad station.

He knew then that the dark bulk was a clump of trees.
Then, before he could fairly sense it, the doctor's motor came hurtling down the street, its search-lights glaring, swinging from side to side.

The machine stopped, and Von Rosen ran to the door.
"Here I am," said Sturtevant in a hushed voice.

There was a sound from the room above, and the doctor, Von Rosen and nurse looked at each other.

Then Von Rosen sat again alone in his study, and now, in spite of the closed door, he heard noises above stairs.