_Indianapolis, Nov. 11th._--We arrived here late this afternoon, and have not been able as yet to see anything of the town, I shall therefore defer a description of it to my next. The road from Chicago was not without its interest, though we are becoming very tired of the prairies. At first starting we went for many miles along the borders of Lake Michigan, which we again came upon at a very remarkable spot, Michigan city, about sixty miles from Chicago. Along the first part of the lake, in the neighbourhood of Chicago, the shore consists of fine sand, in strips of considerable width, and flat like an ordinary sea beach; but at Michigan city the deep sand reached to a considerable distance inland, and then rose into high dunes, precisely like those on the French coast. As we had to wait an hour there, papa and I scrambled up one of these, and although below there was deep loose sand, yet above it was hard and solid, and bound together with little shrubs like the French dunes. The view of the lake from the top was very pretty, and boundless towards the north, we being at the southern extremity. I picked up a few stones on the beach as a memorial of this splendid lake. We were very much tempted, when at Chicago, to see more of it, and to go to Milwaukee and Madison, but we were strongly advised by Mr. Wilkins not to go further north at this season. The wreaths of snow which during the night have fallen in patches along the road, and greeted our eyes this morning, confirmed us in the wisdom of this advice, and we are now bending our steps once more towards the south. We are still here in the midst of prairie, but more wooded than in our journey of Tuesday. We crossed to-day, at Lafayette, the Wabash, which we had crossed previously at Vincennes, and here, as there, it is a very noble river. This must end my journal for the present. LETTER XII. INDIANAPOLIS.--LOUISVILLE.--LOUISVILLE AND PORTLAND CANAL.--PORTLAND.--THE PACIFIC STEAMER.--JOURNEY TO LEXINGTON.--ASHLAND.--SLAVE PENS AT LEXINGTON.--RETURN TO CINCINNATI.--PENNSYLVANIA CENTRAL RAILWAY.--RETURN TO NEW YORK. Lexington, Kentucky, Nov. 13th, 1858.