At a depth of twenty feet another layer of planking was uncovered, and digging ten feet deeper, a third horizontal bulkhead of timber was laid bare. The excavation was now thirty feet down, and the three men had done all they could without a larger force, hoisting machinery, and other equipment. The natives of Mahone Bay, however, were singularly reluctant to aid the enterprise. Hair-raising stories were afloat of ghostly guardians, of strange cries, of unearthly fires that flickered along the cove, and all that sort of thing. Superstition effectually fortified the place, and those bold spirits, Smith, MacGinnis, and Vaughan were forced to abandon their task for lack of reinforcements. Half a dozen years later a young physician of Truro, Dr. Lynds, visited Oak Island, having got wind of the treasure story, and talked with the three men aforesaid. He took their report seriously, made an investigation of his own, and straightway organized a company backed by considerable capital. Prominent persons of Truro and the neighborhood were among the investors, including Colonel Robert Archibald, Captain David Archibald, and Sheriff Harris. A gang of laborers was mustered at the cove, and the dirt began to fly. The shaft was opened to a depth of ninety-five feet, and, as before, some kind of covering, or significant traces thereof, was disclosed every ten feet or so. One layer was of charcoal spread over a matting of a substance resembling cocoa fibre, while another was of putty, some of which was used in glazing the windows of a house then building on the nearby coast. Ninety feet below the surface, the laborers found a large flat stone or quarried slab, three feet long and sixteen inches wide, upon which was chiselled the traces of an inscription. This stone was used in the jamb of a fireplace of a new house belonging to Smith, and was later taken to Halifax in the hope of having the mysterious inscription deciphered. One wise man declared that the letters read, "Ten feet below two million pounds lie buried," but this verdict was mostly guess-work. The stone is still in Halifax, where it was used for beating leather in a book-binder's shop until the inscription had been worn away. When the workmen were down ninety-five feet, they came to a wooden platform covering the shaft. Until then the hole had been clear of water, but overnight it filled within twenty-five feet of the top. Persistent efforts were made to bail out the flood but with such poor success that the shaft was abandoned and another sunk nearby, the plan being to tunnel into the first pit and thereby drain it and get at the treasure. The second shaft was driven to a depth of a hundred and ten feet, but while the tunnel was in progress the water broke through and made the laborers flee for their lives. The company had spent all its money, and the results were so discouraging that the work was abandoned.