The whole proposition in regard to canal revival would be changed if only the surfaces in Great Britain were the same as they are, say, between Hamburg and Berlin, where in 230 miles of waterway there are only three locks. In this country there is an average of one lock for every 1-1/4 mile of navigation. The sum total of the locks on British canals is 2,377, each representing, on an average, a capitalised cost of £1,360. Instead of a "great central plain," as on the Continent of Europe, we have a "great central ridge," extending the greater length of England. In the 16 miles between Worcester and Tardebigge on the Worcester and Birmingham Canal, there are fifty-eight locks to be passed through by a canal boat going from the Severn to Birmingham. At Tardebigge there is a difference in level of about 250 feet in 3 miles or so. This is overcome by a "flight" of thirty locks, which a 25-ton boat may hope to get through in four hours. Between Huddersfield and Ashton, on the Huddersfield Narrow Canal, there are seventy-four locks in 20 miles; between Manchester and Sowerby Bridge, on the Rochdale Canal, there are ninety-two locks in 32 miles, to enable the boats to pass over an elevation 600 feet above sea level; and at Bingley, on the Leeds and Liverpool Canal, five "staircase" locks give a total lift of 59 feet 2 inches. Between London and Liverpool there are three canal routes, each passing through either ten or eleven separate navigations, and covering distances of from 244 to 267 miles. By one of these routes a boat has to pass through such series of locks as ninety in 100 miles on the Grand Junction Canal, between Paddington and Braunston; forty-three in 17 miles on the Birmingham Canal, between Birmingham and Aldersley; and forty-six in 66 miles on the Shropshire Union Canal, between Autherley and Ellesmere Port. Proceeding by an alternative route, the boat would pass through fifty-nine locks in 67 miles on the Trent and Mersey; while a third route would give two hundred and eighty-two locks in a total of 267 miles. The number of separate navigations is ten by Routes I. and II., and eleven by Route III.