The excitement in the city continued very great all day, and thousands of persons went down to the Heads. The description of what had been so appalling to the gazing multitude on Friday, still remained but too strictly applicable to the same scene in the vicinity of the Gap at the foot of the rocks (_see Engraving_). To quote the vivid language of the _Era_ Newspaper.--"It was manifest that the ill-fated vessel must have struck when all on board had retired to rest, as the majority of the bodies were in a state of complete nudity or only covered with night dresses. Corpses of men, women, and children, some of them fearfully mutilated, were dashed against the beetling crags, and as rapidly borne back again by the relentless surge, while here and there, heads or limbs which had been torn off by repeated concussions against the rocks, were thrown up as if in jeering mockery by the very element that had caused their destruction. The sea was strewn with portions of the wreck, bedding, and wearing apparel; in fact, it was impossible for a vessel to move a yard without encountering fresh evidence of the extent of the heart-rending calamity." At about noon, it was reported that a solitary survivor from the wreck had been seen alive, far below, under the cliffs, and that exertions were being promptly made in the hope of rescuing him from his dreadful situation. Coffins were sent off down the harbour by the Washington, for the dead, and such mangled remains as could be recovered, and tackle &c., to draw up the living man, if such there were, to the top of the precipice. This report as to one poor fellow having escaped, proved true, but it gave rise to many others, as to three or four similar cases having occurred, which were unhappily without foundation. More than four or five brave hearts signalized themselves in this affair, and in their hazardous and often successful efforts at rescuing the lifeless bodies from the action of the waves. The man thus found alive and comparatively uninjured (although of course in a very exhausted state) gave his name as James Johnson, one of the crew of the Dunbar as soon as he came a little to himself. An interesting account of this will be found subjoined in the form of a letter, from the Mayor of Sydney, published in the "Herald" Newspaper of Monday. He seemed to think that the Captain must have mistaken the Gap for the true entrance to the harbour, as he went on all sails set. He remembered little or nothing after, until he found himself on the ledge of the rocks, stunned and stupid. Further particulars were now constantly received of portions of the wreck, which, from want of space, we cannot here state in detail. The following particulars appeared in the second supplement of the "Herald" of this day (Saturday.) [FROM A VISITOR TO THE HEADS.]