In the afternoon Professor Silliman took papa a long walk in the country, and geologised him among basaltic rocks of great beauty; and in passing through the woods, they made a grand collection of red leaves. I had, during this walk, been deposited with Mrs. Silliman, and we remained and drank tea with them. The professor's father, also Professor Silliman, a most energetic gentleman, upwards of eighty years old, came to meet us, as did Professor Dana and one or two others, including the gentleman who preached to the boys. I cannot get papa to tell me how he preached, and must draw my own conclusion from his silence. He will only admit that the pew was very comfortable and the cushion soft, and as he was kept awake all last night by mosquitoes, the inference to be drawn is not difficult. I have since been employed in arranging my leaves in a blotting-book, which I got at Boston for that purpose, and as it is late must close this for to-night. _New York, October 4th._--We left New Haven this morning and arrived here this afternoon. The intermediate country along the northern shore of Long Island Sound is very interesting. We crossed a great many rivers which in England would be deemed large ones, at the mouths of which were pretty villages, but we passed so rapidly that we had scarcely time to do more than catch a glimpse of them. As the mail leaves to-morrow, I must conclude this. FOOTNOTES: [4] Our driver, some years ago, at Pau. [5] We, unfortunately, never had an opportunity of returning to Cambridge. LETTER VI. DESTRUCTION OF THE CRYSTAL PALACE.--PHILADELPHIA.--CEMETERY.--GIRARD COLLEGE.--BALTIMORE.--AMERICAN LITURGY.--RETURN TO PHILADELPHIA.--PENITENTIARY.--RETURN TO NEW YORK. New York, 12th Oct. 1858. We have seen comparatively so little since I last wrote to you, that I have hesitated about sending by this mail any account of our travels; but I believe, upon the whole, it may be as well to give you an account of our movements up to this time. My last letter would tell you of our arrival at this place. The evening was so fine, that papa and I were induced to go to the Crystal Palace. Although very inferior to ours at Sydenham, it was interesting as being filled with an immense variety of farming implements, which had been brought together for the great annual agricultural show. There were also large collections of sewing machines, hydraulic presses, and steam engines, besides collections of smaller articles, watches, jewellery, &c.; and a great many statues, including the original models of Thorwaldsen's colossal group of our Saviour and the Apostles. The place was brilliantly lighted up, and the effect was very striking.