Captain Smith's adventure reminded a brother diver, in whose presence it was told, of a narrow escape of his own. It occurred while he was putting some copper on the bottom of a steamer in dock. "I took some plate down with me," he said, "and worked for a while on one side of the hull, after which I started in to put some plates on the other side. The vessel was about three feet off the bottom, and I crawled underneath, dragging the plates behind me. After I had been at work for an hour or so I noticed that my air was getting short, but when I tried to get under the keel again to be hauled up, I found the steamer on the bottom and squeezing my air-hose between its keel and the ground. The tide was ebbing and the hull had gradually sunk until it was almost aground. I had forgotten all about the tide, and when I pulled the hose it refused to move an inch. If the bottom had been soft it would not have mattered so much, but it was rock, and the hose was gripped like a vise. There was nothing to do but wait; if she fell any lower the air would be entirely shut off and I would have to die. Not till my last hour shall I forget the torture of those few minutes while I waited to see whether it rose or fell. My head felt as though it was bursting, and my nose and ears were bleeding. I took heart, however, when the air began to freshen, for I knew then that the tide had turned, and that the hull was rising. There was plenty of time for me to recover my nerve before it was high enough off the bottom for me to crawl under, but I did not get it back. Instead, I stood there shaking like one stricken with palsy until I could squeeze under the bottom and give the signal to be hauled up. I reached the surface in a half-fainting condition, and was sick for weeks afterward. When I did recover it was with hearing permanently impaired." Diving in the Great Lakes is attended with even greater perils than those I have just been describing. In Lake Huron, opposite the entrance of Thunder Bay, a large buoy marks the spot where, nearly twenty-five fathoms deep, lies the wreck of a once famous lake vessel, which sank while sixty of its passengers were still in their berths, not one of whom evermore made sign. The steamer took down with it when it sank not only that precious human freight, but $300,000 in gold coin and five hundred tons of copper. The sunken steamer was the Pewabic. Bound down the lakes from Copper Island, then the richest known deposit of pure copper in the world, it collided with the steamer Meteor, bound up the lakes, and sank almost instantly.