Voyage up the Ohio (continued)--Illinois--Evansville--Owensborough --Indiana--New Albany--Louisville, and its Cruel Histories--The Grave of President Harrison--Arrival in Cincinnati--First Impressions--The Congregational Minister--A Welsh Service. The Ohio, the "beautiful river," is a magnificent stream formed by the confluence at Pittsburg of the Allegany and Monongahela Rivers, and is 1,008 miles long, constituting the boundary of six States: Ohio, Indiana, and Illinois on the north,--all free States; and Virginia, Kentucky, and Tennessee on the south,--all slave States. A trip on this river, therefore, affords a fine opportunity for observing the contrast between slavery and freedom. The Ohio is the great artery through which the inland commerce of the Eastern States flows into the valley of the Mississippi. In ascending this river, we had first on our left the State of Illinois. This territory, which contains an area of 60,000 square miles, was settled by the French in 1720, and was admitted into the Union in 1818. Its population in 1810 was 12,300; in 1840, 476,180. It is now, probably, not far short of 1,000,000! On the 19th of February, about noon, we arrived at Evansville, on the Indiana side of the river. This was the prettiest place we had yet seen; and its charms were enhanced by the assurance that it was free from the taint of slavery. The rise of this little town has been rapid. Its population is about 3,000. Three "churches," with their neat and graceful spires, rising above the other buildings, were conspicuous in the distance. At 5 P.M. we passed Owensborough, on the Kentucky side of the river. This, too, is a neat little town, with a proportionate number of places of worship. Indeed, on every hand, places of worship appear to rise simultaneously with the young settlement. The free and efficient working of the voluntary principle is the glory of America. In reference to "church" accommodation, it everywhere appears to decided advantage compared to the most favoured parts of England. On this subject Dr. Baird's book on Religion in America is very truthful. The fever left me on entering the Ohio, and returned no more,--a clear proof that this river is healthier than the Mississippi. The latter has much fog and malaria, which tell quickly upon a constitution like mine, already predisposed by residence among the swamps of Guiana to fever and ague. As I have already intimated, we had now Indiana, a free State, on our left. This State is rapidly advancing in wealth and population. It was settled by the French in 1730, and became an independent State in 1816. It has an area of 36,840 square miles, being by two-fifths less than its neighbour Illinois. Its population at the beginning of this century was only 5,640; in 1840 it was 685,860. It is now above a million! In 1840 it produced upwards of four millions of bushels of wheat, and twenty-eight millions of corn!