That such regions in truth existed, seemed amply clear from many things. Faint cries and groans unmistakably came up now and then from what appeared to be the solid earth in places far from any structure; whilst hidden in the bushes along the riverbank in the rear, where the high ground sloped steeply down to the valley of the Pawtuxet, there was found an arched oaken door in a frame of heavy masonry, which was obviously an entrance to caverns within the hill. When or how these catacombs could have been constructed, Weeden was unable to say; but he frequently pointed out how easily the place might have been reached by bands of unseen workmen from the river. Joseph Curwen put his mongrel seamen to diverse uses indeed! During the heavy spring rains of 1769 the two watchers kept a sharp eye on the steep river-bank to see if any subterrene secrets might be washed to light, and were rewarded by the sight of a profusion of both human and animal bones in places where deep gullies had been worn in the banks. Naturally, there might be many explanations of such things in the rear of a stock farm, and in a locality where old Indian burying-grounds were common, but Weeden and Smith drew their own inferences.