night proved an exciting one. Fortunately for us it was cloudy,
with rain, at intervals. Murphy, the wireless operator, listening under
the wall declared that we were not mistaken. The men were sending
messages in code.

"Most probably," he said, "they have another station across at Borkum,
Wilhelmshaven, or somewhere. I wonder what they're at?" he added, much
puzzled.

Through those long hours we watched anxiously; but just before the dawn
Dubois and Busch lowered their apparatus from the top of the chimney,
and a few minutes later emerged, walking together towards the hotel.

As soon as they were out of sight we held a consultation, and it was
decided that, while Murphy and I kept watch for the police, Ray should
use his jemmy upon the door and break it open. He would admit us and
remain himself outside to give us warning.

Those moments were breathless ones.

We parted, the wireless operator walking one way, while I went in the
opposite direction. Suddenly we heard the cracking of wood, followed by
a low cough.

By that, we knew all was well.

We hurried back, and a few seconds later were in the courtyard of the
disused factory. Ray had handed me his jemmy, and with it I broke open
the second door of the empty place, flashing a light with the electric
torch I carried.

We passed into the small office, but no second glance was needed to show
that the place was completely fitted with a wireless installation of the
most approved pattern.

"We'll try it," suggested young Murphy, and taking out the apparatus we
hauled it up to the top of the chimney. Then re-entering the office, he
placed the receiver over his ears, and listened intently, in his hand a
pencil he had found ready upon the paper pad.

I stood watching his face. Apparently he heard nothing.

Then he touched the key of the instrument and instantly a great blue
spark, causing a crackling noise, flashed across the room.

He was calling.

Suddenly his face brightened, and he was listening. Then he grew greatly
puzzled.

Taking the receiver off his head he began to search the table upon which
were several books; but at that instant I heard a light footstep behind
me, and as I turned I felt a heavy crushing blow upon the top of my
skull.

Then the blackness of unconsciousness fell upon me.

I knew no more till, on opening my eyes, I found myself lying in bed
with a nurse bending over me.

I gazed around in amazement. There were other beds in