At first his sympathies, like those of most of the leading members of the Amsterdam community, seem to have been Royalist, for in 1642 we find him extolling the queen of Charles I. in an oration.[30] In 1647 he was still far from recognising in the Puritan revolt a movement calling for his Messianic sympathy; for, writing to an English friend in that year, he described the Civil War, not, as he afterwards believed it to be, as a struggle of the godly against the ungodly, but as a Divine punishment for the expulsion of his co-religionists from Britain in the thirteenth century.[31] This letter is interesting as showing that his mind was then already beginning to be exercised by the Resettlement question; but he evidently had as yet no definite idea of taking any practical action. In the autumn of 1649 a method of action was suggested to him by a letter he received from the well-known English Puritan, John Dury, whose acquaintance he had made in Amsterdam five years previously. A friend of John Dury, one Thomas Thorowgood, was deeply interested in the missionary labours of the famous evangelist, John Eliot, among the American Indians; and in order to prevail upon the philo-Jewish public to provide money for the support of the mission, had compiled a treatise showing that the American Indians were the Lost Tribes. This work was largely founded on the conjectures of the early Spanish missionaries, who had up to that time a monopoly of this solution of the Ten Tribes problem. It was written in 1648, and dedicated to the King, but the renewal of the Civil War in that year prevented its publication.[32] Thorowgood thereupon sent the proofs of the first part of the work to John Dury to read. It happened that Dury, while at the Hague in 1644, had heard some stories about the Ten Tribes which had very much interested him. One was to the effect that a Jew, named Antonio de Montezinos, or Aaron Levy, had, while travelling in South America, met a race of savages in the Cordilleras, who recited the _Shema_,[33] practised Jewish ceremonies, and were, in short, Israelites of the Tribe of Reuben. Montezinos had related his story to Menasseh ben Israel, and had even embodied it in an affidavit executed under oath before the chiefs of the Amsterdam Synagogue. As soon as Dury received Thorowgood’s treatise, he remembered this story, and at once wrote to Menasseh ben Israel for a copy of the affidavit. The courteous Rabbi sent it to him by return of post,[34] and it was printed for the first time as an appendix to an instalment of Thorowgood’s treatise, which, at Dury’s instance, was published in January 1650.[35]