Pack my bags right away, will you? For Florida. The usual things.... Yes, right away. I'll be leaving by noon.... Yes, driving through."

hat was that. There were a few more letters to sign, a few hasty instructions to be given regarding one or two matters that were hanging fire. Then, on my way to my bachelor apartments, I read the telegram through again:

MERCER

I smiled at Mercer's frank opinion of my disposition and my importance to my business. But I frowned over the admonition to make my will, and the last telling statement in the wire: "Perhaps we shall see her again." I knew whom he meant by "her."

Josef had my bags waiting for me. A few hurried instructions, most of them shouted over my shoulder, and I was purring down the main drag, my duffel in the rumble, and the roadster headed due south.

"Perhaps we shall see her again." Those words from the telegram kept coming before my eyes. Mercer knew what he was about, if he wanted my company, when he put that line in his wire.

 have already told the story of our first meeting with the strange being from the ocean's depths that, wounded and senseless, had been flung up on the beach near Warren Mercer's Florida estate. In all the history of civilization, no stranger bit of flotsam had ever been cast up by a storm.

Neither of us would ever forget that slim white creature, swathed in her veil of long, light golden hair, as she crouched on the bottom of Mercer's swimming pool, and pictured for us, by means of Mercer's thought-telegraph (my own name for the device; he has a long and scientific title for it with as many joints as a centipede), the story of her people.

They had lived in a country of steaming mist, when the world was very young. They had been forced into the sea to obtain food, and after many generations they had gone back to the sea as man once emerged from it. They had grown webs on their hands and feet, and they breathed oxygen dissolved in water, as fishes do, instead of taking it from the atmosphere. And under the mighty Atlantic, somewhere, were their villages.

The girl had pictured all these things for us, and then—nearly a year ago, now—she had pleaded with us to let her return to her people. And so we had put her back into the sea, and she had bade us farewell. But just before she disappeared, she had done a strange thing.

he had pointed, under the water, out towards the depth, and then, with a broad, sweeping motion of her arm, she had indicated the shore, as though to promise, it seemed to me, that she intended to return.

And now, Mercer said, we might see her again! How? Mercer, conservative and scientific, was not the man to make rash promises. But how...?

The best way to solve the riddle was to reach Mercer, and I broke the speed laws of five states three days running.

I did not even stop at my own little shack. It was only four miles from there to the huge, rather neglected estate, built in boom times by some newly-rich promoter, and dubbed by Mercer "The Monstrosity."

Hardly bothering to slow down, I turned off the concrete onto the long, weed-grown gravel drive, and shot between the two massive, stuccoed pillars that guarded the drive. Their corroded bronze plates, bearing the original title of the estate, "The Billows," were a promise that my long, hard drive was nearly at an end.

s soon as the huge, rambling structure was fairly in sight, I pressed the flat of my hand on the horn button. By the time I came to a locked-wheel halt, with the gravel rattling on my fenders, Mercer was there to greet me.

"It's ten o'clock," he grinned as he shook hands. "I'd set noon as the hour of your arrival. You certainly must have made time, Taylor!"

"I did!" I nodded rather grimly, recalling one or two narrow squeaks. "But who wouldn't, with a wire like this?" I produced the crumpled telegram rather dramatically. "You've got a lot to explain."

"I know it." Mercer was quite serious now. "Come on in and we'll mix highballs with the story."

Locked arm in arm, we entered the house together, and settled ourselves in the huge living room.

Mercer, I could see at a glance, was thinner and browner than when we had parted, but otherwise, he was the same lithe, soft-mannered little scientist I had known for years; dark-eyed, with an almost beautiful mouth, outlined by a slim, closely cropped and very black moustache.

"Well, here's to our lady from the sea," proposed Mercer, when Carson, his man, had brought the drinks and departed. I nodded, and we both sipped our highballs.

"Briefly," said my friend, "this is the story. You and I know that somewhere beneath the Atlantic there are a people who went back to whence they came. We have seen one of those people. I propose that, since they cannot come to us, we go to them. I have made preparations to go to them, and I wanted you to have the opportunity of going with me, if you wish."

"But how, Mercer? And what—"

e interrupted with a quick, nervous gesture.

"I'll show you, presently. I believe it can be done. It will be a dangerous adventure, though; I was not joking when I advised you to make your will. An uncertain venture, too. But, I believe, most wonderfully worth while." His eyes were shining now with all the enthusiasm of the scientist, the dreamer.

"It sounds mighty appealing," I said. "But how...."

"Finish your drink and I'll show you."

I downed what was left of my highball in two mighty gulps.

"Lead me to it, Mercer!"

He smiled his quiet smile and led the way to what had been the billiard room of "The Billows," but which was the laboratory of "The Monstrosity." The first thing my eyes fell upon were two gleaming metal objects suspended from chains let into the ceiling.

"Diving suits," explained Mercer. "Rather different from anything you've ever seen."

They were different. The body was a perfect globe, as was the head-piece. The legs were cylindrical, jointed at knee and thigh with huge discs. The feet were solid metal, curved rocker-like on the bottom, and at the ends of the arms were three hooked talons, the concave sides of two talons facing the concave side of the third. The arms were hinged at the elbow just as the legs were hinged, but there was a huge ball-and-socket joint at the shoulder.

ut Mercer!" I protested. "No human being could even stand up with that weight of metal on and around him!"

"You're mistaken, Taylor," smiled Mercer. "That is not solid metal, you see. And it is an