car and her very expressive
face. Was it really, I wondered, that Creighton, more than his motor,
has fascinated her?

She drew up before the Consolidated Bank Building, a modern steel and
concrete structure in the uptown business section.

"The laboratory is next door," she said, as she let the car slide ahead
a few feet more. "Mr. Tresham's office is in the Bank Building. I've had
to go there so often since father died that I stopped through force of
habit, I suppose."

Mindful of Kennedy's admiration for Freud, his theory of forgetting
occurred to me. Was there any significance in the mistake? Had the
unconscious blunder betrayed something which perhaps she herself
consciously did not realize? Was it Tresham, after all, whom she really
admired and wanted to see?

Creighton's workshop was in an old two-story brick building, evidently
awaiting only the development of the neighborhood before it was torn
down. Meanwhile the two buildings were in marked contrast. Which of them
typified Creighton? Was he hopelessly out of date, or really ahead of
his time? I must confess to having had a lively curiosity to meet the
inventor.

The entrance to the laboratory from the street was through a large door
into a room in which was a carpenter's bench. On one side were some
powerful winches and a large assortment of tools. In the back of the
room a big door led to another room on the ground floor to the rear.

"Mr. Creighton's is upstairs," remarked Miss Laidlaw, turning past the
locked door and going up a worn flight of steps.

"Whose shop is that?" asked Kennedy, indicating the door.

"I don't know who rents these rooms down here," she replied.

Up the stairway we went to the second floor. On the top landing stood
some old machinery. In a little room on one side was a big desk, as well
as books, instruments, and drawings of all sorts. Opposite this room was
another little room, with many bits of expensive machinery on shelves
and tables. Back of these two, and up a step, was a large room, the full
width of the building, the workshop of the inventor, into which she led
us.

"I've brought a couple of friends of mine who may be interested in the
vibrodyne motor," Miss Laidlaw introduced us.

"Very pleased to meet you, gentlemen," Creighton returned. "Before we
get through, I think you'll agree with me that you never dreamed of
anything more wonderful than this motor of mine."

He was a large, powerfully built man, with