For the next hour all was eager watchfulness on board, as we approached very slowly, shortening sail, and with two men in the chains heaving the lead on account of the hidden reefs and shoals off some of the islands. But, as we approached, nothing more could be made out till the man aloft hailed the deck, and announced that he could read the name on the stern, _Dunstaffnage, Glasgow_.  Another hour passed, during which the island, a couple of miles beyond, was swept by glass after glass, and tree and hill examined, but there was no sign of signal on tree or hill.  All was bare, chilly, and repellent there, and we felt that the crew of the vessel could not have taken refuge ashore.