metal skeletons from their chains. I had thought the bodies werq perfect globes; I could see now that at the rear there was a humplike excrescence across the shoulders.
"Air," explained Mercer, "There are two other tanks inside the globular body. That shape was adopted, by the way, because a globe can withstand more pressure than any other shape. And we may have to go where pressures are high."
"And so," I said, "we don these things and stroll out into the Atlantic looking for the girl and her friends?"
"Hardly. They're not quite the apparel for so long a stroll. You haven't seen all the marvels yet. Come along!"
HE led the way through the patio, beside the pool in which our strange visitor from the depths had lived during her brief stay with us, and out into the open again. As we neared the sea, I became aware, for the first time, of a faint, muffled hammering sound, and I glanced at Mercer inquiringly.
"Just a second," he smiled. "Then—there she is, Taylor!"
I stood still and stared. In a little cove, cradled in a cunning, spidery structure of wood, a submarine rested upon the ways.
"Good Lord!" I exclaimed. "You're going into this right, Mercer? "Yes. Because I think it's immensely worth while. But come along and let me show you the Santa Maria—named after the flagship of Columbus' little fleet. Come on!"
Two men with army automatics strapped significantly to their belts nodded courteously as we came up. They were the only men in. sight, but from the hammering going on inside there must have been quite a sizeable crew busy in the interior. A couple of raw pine shacks, some little distance away, provided quarters for, I judged, twenty or thirty men.
"Had her shipped down in pieces," explained Mercer. "The boat that brought it lay to off shore and we lightered the parts ashore. A tremendous job. But she'll be ready for the water in a week; ten days at the latest."
"You're a wonder," I said, and I meant it.
MERCER patted the red-leaded side of the submarine affectionately. "Later," he said, "I'll take you inside, but they're busy as the devil in there, and the sound of the hammers fairly makes your head ring. You'll see it all later, anyway—if you feel you'd like-to share the adventure with me?"
"Listen," I grinned, as we turned back towards the house, "it'll take more than those two lads with the pop-guns to keep me out of the Santa Maria when she sails—or dives, or whatever it is she's supposed to do!"
Mercer laughed softly, and we walked the rest of the way in silence. I imagine we were both pretty busy with our thoughts; I know that I was. And several times, as we walked along, I looked back over my shoulder towards the ungainly red monster straddling on her spindling wooden legs— and towards the smiling Atlantic, glistening serenely in the sun.
MERCER was so busy with a thousand and one details that I found myself very much in the way if I followed him around, so I decided to loaf.
For weeks after we had put our strange girl visitor back into the sea from whence Mercer had taken her, I had watched from a comfortable seat well above the high-water mark that commanded that section of shore. For I had felt sure by that last strange gesture of hers that she meant to return. I located my old seat, and I found that it had been used a great deal since I had left it. There were whole winnows of cigarette butts, some of them, quite fresh, all around. Mercer, coldblooded scientist as he was, had hoped
