That I may not be thought capable of abusing the reader's confidence by inventing conversations, speeches, or letters, I would take this opportunity of stating--although I have repeated the remark in the foot-notes--that no personage in these pages is made to write or speak any words save those which, on the best historical evidence, he is known to have written or spoken.
A brief allusion to my sources of information will not seem superfluous: I have carefully studied all the leading contemporary chronicles and pamphlets of Holland, Flanders, Spain, France, Germany, and England; but, as the authorities are always indicated in the notes, it is unnecessary to give a list of them here.

But by far my most valuable materials are entirely unpublished ones.
The archives of England are especially rich for the history of the sixteenth century; and it will be seen, in the course of the narrative, how largely I have drawn from those mines of historical wealth, the State Paper Office and the MS.

department of the British Museum.

Although both these great national depositories are in admirable order, it is to be regretted that they are not all embraced in one collection, as much trouble might then be spared to the historical student, who is now obliged to pass frequently from the one place to the other, in order to, find different portions of the same correspondence.
From the royal archives of Holland I have obtained many most important, entirely unpublished documents, by the aid of which I have endeavoured to verify, to illustrate, or sometimes to correct, the recitals of the elder national chroniclers; and I have derived the greatest profit from the invaluable series of Archives and Correspondence of the Orange-Nassau Family, given to the world by M.Groen van Prinsterer.

I desire to renew to that distinguished gentleman, and to that eminent scholar M.Bakhuyzen van den Brink, the expression of my gratitude for their constant kindness and advice during my residence at the Hague.