Then came the heavier problem of what authorities to quote for each event. And here also the editors owe much to the capable aid of many generous, unremunerated advisers. Thus, for instance, they sought and obtained from the Hon. Joseph Chamberlain his advice as to the authorities to be used for the Jameson raid and the Boer war. The account presented may therefore be fairly regarded as England's own authoritative presentment of those events. Several little known and wholly unused Russian sources were pointed out by Professor Rambaud, the French Academician. But this is mentioned only to illustrate the impartiality with which the editors have endeavored to cover all fields. If, under the plea of expressing gratitude to all those who have lent us courteous assistance, we were to spread across these pages the long roll of their distinguished names, it would sound too much like boasting of their condescension. The work of selecting the accounts has been one of time and careful thought. Many thousands of books have been read and read again. The cardinal points of consideration in the choice have been: (1) Interest, that is, vividness of narration; (2) simplicity, for we aim to reach the people, to make a book fit even for a child; (3) the fame of the author, for everyone is pleased to be thus easily introduced to some long-heard-of celebrity, distantly revered, but dreaded; and (4) accuracy, a point set last because its defects could be so easily remedied by the specialist's introduction to each event. These considerations have led occasionally to the selection of very ancient documents, the original "sources" of history themselves, as, for instance, Columbus' own story of his voyage, rather than any later account built up on this; Pliny's picture of the destruction of Pompeii, for Pliny was there and saw the heavens rain down fire, and told of it as no man has done since. So, too, we give a literal translation of the earliest known code of laws, antedating those of Moses by more than a thousand years, rather than some modern commentary on them. At other times the same principles have led to the other extreme, and on modern events, where there seemed no wholly satisfactory or standard accounts, we have had them written for us by the specialists best acquainted with the field. As the work thus grew in hand, it became manifest that it would be, in truth, far more than a mere story of events. With each event was connected the man who embodied it. Often his life was handled quite as fully as the event, and so we had biography. Lands had to be described--geography. Peoples and customs--sociology. Laws and the arguments concerning them--political economy. In short, our history proved a universal cyclopaedia as well.