It was Jason Gridley on the telephone. He seemed excited and asked me to come to his laboratory at once. As Jason is seldom excited about anything, I hastened to accede to his request and satisfy my curiosity. Jumping into my roadster, I soon covered the few blocks that separate us, to learn that Jason had good grounds for excitement. He had just received a radio message from the inner world, from Pellucidar.

On the eve of the departure of the great dirigible, O-220, from the earth’s core, following the successful termination of that historic expedition, Jason had determined to remain and search for von Horst, the only missing member of the party; but Tarzan, David Innes, and Captain Zuppner had persuaded him of the folly of such an undertaking, inasmuch as David had promised to dispatch an expedition of his own native Pellucidarian warriors to locate the young German lieutenant if he still lived and it were possible to discover any clue to his whereabouts.

Notwithstanding this, and though he had returned to the outer world with the ship, Jason had always been harassed by a sense of responsibility for the fate of von Horst, a young man who had been most popular with all the members of the expedition; and had insisted time and time again that he regretted having left Pellucidar until he had exhausted every means within his power of rescuing von Horst or learned definitely that he was dead.

Jason waved me to a chair and offered me a cigarette. “I’ve just had a message from Abner Perry,” he announced, “the first for months.”

“It must have been interesting,” I commented, “to excite you.”

“It was,” he admitted. “A rumor has reached Sari that von Horst has been found.”

Now as this pertains to a subject entirely foreign to the present volume, I might mention that I have alluded to it only for the purpose of explaining two facts which, while not vital, have some slight bearing on the remarkable sequence of events which followed. First, it caused me to forget the letter I just mentioned, and, second, it fixed the date in my mind—the tenth.

My principal reason for mentioning the first fact is to stress the thought that the matter of the letter, so quickly and absolutely forgotten, had no opportunity to impress itself upon my mind and therefore could not, at least objectively, influence my consideration of ensuing events. The letter was gone from my mind within five minutes of its reading as completely as though it had never been received.

The next three days were exceedingly busy ones for me, and when I retired on the night of the thirteenth my mind was so filled with the annoying details of a real estate transaction that was going wrong, that it was some time before I could sleep. I can truthfully affirm that my last thoughts were of trust deeds, receivers in equity, and deficiency judgments.

What awoke me, I do not know. I sat up with a start just in time to see a female figure, swathed in what appeared to be a white winding sheet, enter my room through the door. You will note that I say door rather than doorway, for such was the fact; the door was closed. It was a clear, moonlit night; the various homely objects in my room were plainly discernible, especially the ghostly figure now hovering near the foot of my bed.