In the evening quite a circle came in; among others, Lady Emma Campbell, sister of the Duke of Argyle; the daughters of the Archbishop of Canterbury, who very kindly invited me to visit them, at Lambeth; and Mr. Arthur Helps, besides many others whose names I need not mention. People here continually apologize for the weather, which, to say the least, has been rather ungracious since we have been here; as if one ever expected to find any thing but smoke, and darkness, and fog in London. The authentic air with which they lament the existence of these things _at present_ would almost persuade one that _in general_ London was a very clear, bright place. I, however, assured them that, having heard from my childhood of the smoke of London, its dimness and darkness, I found things much better than I had expected. They talk here of spirit rappings and table turnings, I find, as in America. Many rumors are afloat which seem to have no other effect than merely to enliven the chitchat of an evening circle. I passed a very pleasant evening, and left about ten o'clock. The gentleman who was handing me down stairs said, "I suppose you are going to one or two other places to-night." The idea struck me as so preposterous that I could not help an exclamation of surprise. May 6. A good many calls this morning. Among others came Miss Greenfield, the (so called) Black Swan. She appears to be a gentle, amiable, and interesting young person. She was born the slave of a kind mistress, who gave her every thing but education, and, dying, left her free with a little property. The property she lost by some legal quibble, but had, like others of her race, a passion for music, and could sing and play by ear. A young lady, discovering her taste, gave her a few lessons. She has a most astonishing voice. C. sat down to the piano and played, while she sung. Her voice runs through a compass of three octaves and a fourth. This is four notes more than Malibran's. She sings a most magnificent tenor, with such a breadth and volume of sound that, with your back turned, you could not imagine it to be a woman. While she was there, Mrs. S.C. Hall, of the Irish Sketches, was announced. She is a tall, well-proportioned woman, with a fine color, dark-brown hair, and a cheerful, cordial manner. She brought with her her only daughter, a young girl about fifteen. I told her of Miss Greenfield, and, she took great interest in her, and requested her to sing something for her. C. played the accompaniment, and she sung Old Folks at Home, first in a soprano voice, and then in a tenor or baritone. Mrs. Hall was amazed and delighted, and entered at once into her cause. She said that she would call with me and present her to Sir George Smart, who is at the head of the queen's musical establishment, and, of course, the acknowledged leader of London musical judgment.