There is such an extent and variety of 'terra incognita' in this illimitable London, that with no other guide than chance one is sure to fall upon something new and interesting. In this way I found myself to-day in Lincoln's Inn Fields, a noble square, almost a German mile from my lodging, surrounded with fine buildings, and adorned with lofty trees and beautiful turf. The most considerable edifice is that of the College of Surgeons, and contains a very interesting museum. One of the gentlemen showed me the establishment with great civility. The first thing which claimed my attention was a very pretty little mermaid which had been exhibited here for money some years ago, and was afterwards sold for a thousand pounds, when it was discovered that she was a deceptive contrivance made out of a small ourang-outang and a salmon, joined together in a most workmanlike manner. The existence of such creatures remains, therefore, as much a problem as ever. Near to it stood a real large ourang-outang, who lived here for a long time, and performed many domestic services in the house. Mr. C---- (so my informant was called) assured me that he must regard this animal as of a distinct genus, nearer to man than to the ape. He had long and attentively observed this individual, and had found in him the most certain proofs of reflection and combination, evidently far beyond the reach of instinct. Thus, he remarked that Mr. Dick (as he called him) felt in gentlemen's pockets, if he were permitted, for eatables; but if his search was unsuccessful, carefully replaced every thing that did not answer his purpose, instead of throwing it away or letting it fall, as all other monkeys do. He was so sensitive to the slightest mark of displeasure, that he was depressed and unhappy for days after being unkindly spoken to. He was observed, too, to try of his own accord to assist the servants, if he saw them unusually oppressed with work. There were some preparations exhibiting almost incredible cases of recoveries from wounds. The most extraordinary among them was the breast of a man (which Mr. C---- showed me, preserved in spirits,) who had been so completely spitted by the shaft of a carriage, that he could only be dragged from it by the efforts of several persons. The shaft had passed close to the heart and lungs, which, however, it only gently forced aside, without doing them the least injury, and had broken the ribs before and behind. After the man had been extricated from his horrible situation, he had strength enough left to walk up two flights of stairs, and to lie down on a bed. He lived fourteen years after the accident, sound and well; but the surgeons had kept their eye upon him, and got possession of his body as soon as he was dead. They have placed him in their museum, together with the shaft, which had been kept in his family as a relic.