only I suppose Garrick is right. That would defeat our own
purpose."

At last Garrick returned from his hurried trip down to the office.
I don't know what it was we expected him to bring, but I think we
were more or less disappointed when it proved to be merely a
simple oblong oak box with a handle.

He opened it and we could see that it contained in reality nothing
but a couple of ordinary dry cells, and some other paraphernalia.
There were two black discs, attached to a metal headpiece, discs
about two and a half inches in diameter, with a circular hole in
the centre of each, perhaps an inch across, showing inside what
looked like a piece of iron or steel.

Garrick carefully tested the batteries with a little ammeter which
he carried in a case.

"Sixteen amperes," he remarked to himself, "I don't attempt to use
the batteries when they fall below five. These are all right."

From a case he took a little round black disc, about the same size
as the other two. In its face it had a dozen or so small holes
perforated and arranged in the shape of a six-pointed star.

"I wonder where I can stow this away so that it won't attract
attention?" he asked.

Garrick looked about for the least used part of the garage and
decided that it was the back. Near the barred window lay a pile of