Our masks consisted of a huge shirt of air-tight, light material which was belted in tightly around the waist, and bloused out like an ancient balloon when inflated. The arm-holes were sealed by two heavy bands of elastic, close to the shoulders, and the head-piece was of thin copper, set with a broad, curved band of crystal which extended from one side to the other, across the front, giving the wearer a clear view of everything except that which was directly behind him. The balloon-like blouse, of course, was designed to hold a small reserve supply of air, for an emergency, should anything happen to the tank upon the shoulders, or the valve which released the air from it. They were cumbersome, uncomfortable things, but I donned mine and adjusted the menore, built into the helmet, to full strength. I wanted to be sure I kept in communication with both Hendricks and the sentries at the air-lock exit, and of course, inside the helmets, verbal communication was impossible. I glanced at Hendricks, and saw that he was ready and waiting. We were standing inside the air-lock, and the mighty door of the port had just finished turning in its threads, and was swinging back slowly on its massive gimbals. "Let's go, Hendricks," I emanated. "Remember, take no chances, and keep your eyes open." "I'll remember, sir," replied Hendricks, and together we stepped out onto the coarse gravel of the beach. * * * * * Before us, waves of an unhealthy, cloudy green rolled slowly, heavily shoreward, but we had no eyes for this, nor for the amazing vegetation of the place, plainly visible on the curving shores. We took a few hurried steps away from the ship, and then turned to survey the monsters which had attacked it. They literally covered the ship; in several places their transparent, glowing bodies overlapped. And the sides of the _Ertak_, ordinarily polished and smooth as the surface of a mirror, were dull and deeply eroded. "Notice, sir," emanated Hendricks excitedly, "how much brighter the things are! They _are_ feeding, and they are growing stronger and more brilliant. They--look out, sir! They're attacking! Our copper helmets--" But I had seen it as quickly as he. Half a dozen of the glowing things, sensing in some way the presence of a metal which they apparently preferred to that of the _Ertak's_ hull, suddenly detached themselves and came swarming directly down upon us. I was standing closer to the ship than Hendricks, and they attacked me first. Several of them dropped upon me, their glowing bodies covering the vision-piece, and blinding me with their light. I waved my arms and started to run blindly, incoherent warnings coming to me through the menore from Hendricks and the sentries.