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has been built up upon the framework of her rivers, and, in that pattern, the principal line has been the line of the Thames.

Partly because it was the main highway of Southern England, partly because it looked eastward towards the Continent from which the national life has been drawn, partly because it was better served by the tide than any other channel, but mainly because it was the chief among a great number of closely connected river basins, the Thames Valley has in the past supported the government and the wealth of England.

Among the most favoured of our rivals some one river system has developed a province or a series of provinces; the Rhine has done so, the Seine and the Garonne. But the great Continental river systems—at least the navigable ones—stand far apart from one another: in this small, and especially narrow, country of Britain navigable river systems are not only numerous, but packed close together. It is perhaps on this account that we have been under less necessity in the