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 The maps are sufficient in themselves, owing to their number, their scope, and their clearness, to make the work one of great value. The three general maps of Europe, showing the boundaries as fixed by the Vienna Congress Treaty of 1815, as in 1875, and as in 1891, are found on p. 274 (the first volume), p. 1976 (the third volume), and p. 3204 (the fourth volume). In the fourth volume there is a valuable series of maps illustrating the effects of the treaty arrangements of 1878.

For the author it may be claimed that he has fulfilled his object. Owing to the completeness and the connected form in which he has presented the necessary documents both primary and supplementary, the inquirer is no longer called upon to consult several Collections of Treaties, some of them not easily accessible in any one country, or to refer to Blue Books laid before Parliament on the subjects in question, or to State Papers, or even to accounts, apart from estimates, of the events contained in Treatises on International Law or international questions.