Source: "The Midland railway: its rise and progress. A narrative of modern enterprise" by Frederick Smeeton Williams, published by Strahan & Co London (1876). The following extract is from page 501:
Alighting from our engine, we stroll forward to look at the next viaduct: it is in the magnificent Dent Valley, the town of Dent being, however, some eight miles to our left. This viaduct is 200 yards long, of ten semicircular arches, rising 100 feet above the public road, and also over a little mountain torrent that falls into the Dee, which runs hard by on our left.