AS 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 same to a lockedwheel halt, with the gravel rattling on my fenders, Mercer was there to greet me.
"It's ten o'clock," be 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—"
HE 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 rockerlike 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.
"BUT 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 aluminum alloy that is not nearly as heavy as it looks. There are two walls, slightly over an inch apart, braced by innumerable trusses. The fabric is nearly as strong as that much solid metal, and infinitely lighter. They work all right, Taylor. I know, because I've tried them."
"And this hump on the back?" I asked, walking around the odd, dangling figures, hanging like bloated
