Note CK — LETTER XXI.

At this very time, Mr Wright, in spite of his 60 years, is directing in person the Harlæm railroad, the great New York and Erie road, the great work of connecting the James and Kanawha, by a railroad and canal, the works going on along the St. Lawrence in Upper Canada, 750 miles further north, and the railway from Havana to Guines in the islands of Cuba. The aggregate length of all these works is 870 miles. The most eminent engineers have always several works under their direction at once; it is understood, of course, that they are aided by skilful and intelligent assistants, who do most of the work.