Reaching the town square we dispersed to search for the hidden entrances to some of the tunnels reputed to exist. It was unlikely they would be well concealed since few visitors ever came to Innsmouth and, from what little information we had of the place, those who did were watched closely. It was not long before we stumbled upon one of them, covered with a thin layer of earth and coarse grass.
There was an iron-runged ladder fastened to the circular side. It didn’t look particularly secure, testifying to the fact that the tunnel had probably not been in use for several decades. Lowering ourselves down, we used our torches to delineate our surroundings. The tunnel was larger than I had expected, fully ten feet in height and only a little less in width.
Pools of stagnant water lay everywhere, oozing from the muddy ground and running down the slimy walls. Weird echoes came from somewhere in the blackness ahead of us, and not all of them could be put down to sounds of our own making. I struggled desperately to keep my emotions under tight control for there was something about those faint, elusive sounds which set my nerves on edge, lifting the small hairs on the back of my neck.
Then, still some distance ahead, I made out other noises, more distinct, that increased the tension in my mind. Low, throaty mutterings and occasional piping whistles which seemed oddly out of place down there. In addition, there were faint splashing sounds like objects being dropped into water.
Corlson had also picked them out for he gave a hissed order to halt. In the ensuing silence we could now hear the noises distinctly, although it was impossible to pinpoint their position accurately.
Waving an arm, the Lieutenant signalled us to continue. A few moments later, the torchlight showed where the tunnel turned abruptly to the right and, rounding the bend, where the beams from our torches illuminated the area ahead, we all saw the full horror which dwelt within those accursed tunnels which burrowed like gigantic wormholes through the rock!
It was a scene out of a nightmare. Lit by a nauseous green radiance which came from countless luminous algae encrusting the rocks, a vast grotto lay spread out before us. Large stalactites hung from the roof, finding their distorted reflection in a vast pool of sluggish water.
But it was not this that sent me staggering back against the Lieutenant. It was the sight of the indescribable creatures that flopped and floundered around the edge of the black water.
Fish-headed monsters, which belonged only in the mad visions of a deranged mind came surging out of that pool as we emerged onto the slippery, treacherous rocks at its edge. Somewhere there had to be an outlet to the sea for common sense told me such monstrosities had never evolved on the land.
Several of the men with us seemed on the point of running but Corlson shouted a sudden, urgent command and, somehow, succeeded in bringing them back to their senses. Military discipline reasserted itself. My own actions were instinctive. Bringing up my revolver, I fired several shots into the midst of the slithering creatures. Steeling themselves, the marines opened fire as the Lieutenant signalled to them to spread out and take cover.
How many of the hideous ocean dwellers there were it was impossible to estimate, but in the face of the withering rifle fire they were forced to retreat, diving back into the water and disappearing beneath the oily surface. When it was all over, we went forward to examine the bodies. Two of them were still alive with only minor wounds and these were trussed up and left with two men to guard them while we moved on.
Apart from the tunnel along which we had come, three more opened out from around the walls. Checking his compass, the Lieutenant pointed to the one on our left.
“That way,” he said decisively. His voice shook a little. “The others seem to lead deeper into the town.”
Moving cautiously into the tunnel, now fully aware of the danger that lurked beneath Innsmouth, we went forward in single file, our weapons ready for any further attack. Every man among us had been visibly shaken by our recent experience. Normal degeneracy and inbreeding such as was common among small, isolated communities living in the bayou regions and other townships such as Dunwich, we had expected. But these creatures were something completely different. At that moment, some of the odd stories I had heard from one of the few agents to have spent some time in Innsmouth and left to tell the tale, began to assume something approaching the truth.
In places, the tunnel we were following widened out into larger spaces but here we found nothing more abnormal than driftwood and splintered wooden cases which had evidently been left there to rot by bygone smugglers moving contraband into the town from ships lying off Devil Reef.