"The library of Greenwich Observatory is large. The transactions of learned societies alone fill a small room; the whole impression of the thirty volumes of printed observations fills a wall of another room, and the unpublished papers of the early directors make of themselves a small manuscript library. "October 22, 1857. We have just returned from our fourth visit to Greenwich, like the others twenty-four hours in length. We go again to-morrow to meet the Sabines. "Herr Struve, the director of the Pulkova Observatory, is at Greenwich, with his son Karl. The old gentleman is a magnificent-looking fellow, very large and well proportioned; his great head is covered with white hair, his features are regular and handsome. When he is introduced to any one he thrusts both hands into the pockets of his pantaloons, and bows. I found that the son considered this position of the hands particularly _English_. However, the old gentleman did me the honor to shake hands with me, and when I told him that I brought a letter to him from a friend in America, he said, 'It is quite unnecessary, I know you without.' He speaks very good English. "Herr Struve's mission in England is to see if he can connect the trigonometrical surveys of the two countries. It is quite singular that he should visit England for this purpose, so soon after Russia and England were at war. One of his sons was an army surgeon at the Crimea. "Five visitors remained all night at the observatory. I slept in a little round room and Miss S. in another, at the top of a little jutting-out, curved building. Mrs. Airy says, 'Mr. Airy got permission of the Board of Visitors to fit up some of the rooms as lodging-rooms.' Mr. Airy said, 'My dear love, I did as I always do: I fitted them up first, and then I reported to the Board that I had done it.' "October 23. Another dinner-party at the observatory, consisting of the Struves, General and Mrs. Sabine, Professor and Mrs. Powell, Mr. Main, and ourselves; more guests coming to tea. "Mrs. Airy told me that she should arrange the order of the guests at table to please herself; that properly all of the married ladies should precede me, but that I was really to go first, with Mr. Airy. To effect this, however, she must explain it to Mrs. Sabine, the lady of highest rank. "So we went out, Professor Airy and myself, Professor Powell and Mrs. Sabine, General Sabine and Mrs. Powell, Mr. Charles Struve and Miss S., Mr. Main, Mrs. Airy, and Professor Struve. "General Sabine is a small man, gray haired and sharp featured, about seventy years old. He smiles very readily, and is chatty and sociable at once. He speaks with more quickness and ease than most of the Englishmen I have met. Mrs. Sabine is very agreeable and not a bit of a blue-stocking.