"The History of John de Serres ends with the Treatie at Vervins betwixt France and Spaine in the yeare 1598. I have been importuned to make the History perfect, and to continue it unto these times, whereunto I have added (for your better satisfaction) what I could extract out of Peter Mathew and other late writers touching this subject. Some perchance will challenge me of indiscretion, that I have not translated Peter Mathew onely, being reputed so eloquent and learned a Writer. To them I answere first, that I found many things written by him that were not fit to be inserted, and some things belonging unto the Historie, related by others, whereof he makes no mention. Secondly his style is so full and his discourse so copious, as the worke would have held no proportion, for that this last addition of seven years must have exceeded halfe Serres Historie. Which considerations have made me to draw forth what I thought most materiall for the subject, and to leave the rest as unnecessarie." From this we learn that Grimeston followed Jean de Serres till 1598, and that from then till 1604 (his time-limit in his first edition) his principal source was P. Matthieu's _Histoire de France_, rigorously condensed, and, at the same time, supplemented from other authorities. A collation of Grimeston's text with that of the "Byron" plays and _The Revenge_ proves that every passage in which the dramatist draws upon historical materials is to be found within the four corners of the folio of 1607. The most striking illustrations of this are to be found in the "Byron" plays, and I have shown elsewhere (_Athenæum_, _loc. cit._) that though Chapman in handling the career of the ill-fated Marshal of France is apparently exploiting Pierre Matthieu, Jean de Serres, and Cayet in turn, he is really taking advantage of the labours of Grimeston, who had rifled their stores for his skilful historical mosaic. Grimeston must thus henceforward be recognized as holding something of the same relation to Chapman as Sir T. North does to Shakespeare, with the distinction that he not only provides the raw material of historical tragedy, but goes some way in the refining process.