“ In the midst of the pressing duties of his Cambridge life Prothero, rendered a conspicuous service by superintending the English version of Ranke's "Weltgeschichte"—in its way the masterpiece of a master mind—of which he personally translated the second half of the first volume (1883) . He also allowed for himself to humour the "gift for friendship" which (editor as he was during a great part of his life) he never quite succeeded in disguising. ”

“ Perhaps the most important service rendered by Prothero to the study of history in England in these years was his editorship of the "Cambridge Historical Series" (from 1894) . This collection consists of more than a score of handbooks dealing with the history of the several countries of Europe and their chief colonies, or with particular aspects of that history. There can be no doubt that the labours of the editor attest a capacity for extended historical survey unrivalled in our own historical literature. ”

“ Early in 1917, when the possibilities of peace came within sight, a scheme was framed on the initiative of the Admiralty and Foreign Office for the preparation of a series of handbooks, containing geographical, historical, and economic information respecting various countries and territories, and dealing with certain international questions, such as the freedom of the seas, internationialization of rivers, European Coalitions, &c. ”