Manasseh enumerated all the autos-da-fé of Marranos and other Jewish martyrs which had taken place in his time.
Great excitement was caused among Dutch Portuguese Jews by the burning of a young Marrano, twenty-five years old, well read in Latin and Greek literature. Isaac de Castro-Tartas, born at Tartas, a small town in Gascony, had come with his parents to Amsterdam. Glowing with zeal and a desire to bring back to Judaism those Marranos who continued Christians, he prepared to travel to Brazil. In vain his parents and friends warned him against this mad step. In Bahia he was arrested by the Portuguese, recognized as a Jew, sent to Lisbon, and handed over to the Inquisition. This body had no formal right over Isaac de Castro, for when arrested he was a Dutch citizen. The tribunal in vain tried to induce him to abjure Judaism. Young De Castro-Tartas was determined manfully to endure a martyr's death in honor of his faith. His death was attended with the _éclat_ he had longed for. In Lisbon the funeral pile was kindled for him and several others, on December 22d, 1647. He cried out of the flames, "Hear, O Israel, God is one," in so impressive a tone that the witnesses of the dreadful spectacle were greatly moved. For several days nothing else was talked of in the capital but the dreadful voice of the martyr Isaac de Castro-Tartas and the "Shema," uttered with his last breath. People spoke of it shudderingly. The Inquisition was obliged to forbid the uttering of the word "Shema" with a threat of heavy punishment. It is said, too, that at that time it was determined to burn no more Jewish heretics alive in Lisbon.
The Amsterdam community was stunned by the news of successive executions of youthful sufferers. De Castro-Tartas had parents, relatives, and friends in Amsterdam, and was beloved on account of his knowledge and character. The rabbi, Saul Morteira, delivered a memorial address on his death. Poets deplored and honored him in Hebrew and Spanish verses, and, horrified by the new atrocities of the Inquisition against Jews, Manasseh ben Israel wrote "Israel's Hope." Even the reader of to-day can feel grief trembling in every word. Indeed, if martyrs could prove the truth and tenability of the cause for which they bleed, Judaism needs no further proof; for no people and no religion on earth have produced such numerous and firm martyrs. Manasseh used this proof to draw the conclusion that, as promised sufferings had been inflicted, so the promised redemption and regeneration of God's people would be fulfilled. He sent this Latin treatise on the existence of the Ten Tribes and their hopes to a prominent and learned personage in England, to be read before Parliament, which was under Cromwell's influence, and before the Council of State. In an accompanying letter Manasseh explained to Parliament his favorite idea, that the return of the Jews to their native land--the time for which was so near--must be preceded by their complete dispersion. The dispersion, according to the words of Scripture, was to be from one end of the earth to the other, naturally including the island of England, in the extreme north of the inhabited world. But for more than 300 years no Jews had lived in England; therefore, he added the request that the Council and Parliament grant Jews permission to settle in England, to have the free exercise of their religion, and to build synagogues there (1650). Manasseh made no secret of his Messianic hopes, because he could and did reckon upon the fact that the saints or Puritans themselves wished for the "assembling of God's people" in their ancestral home, and were inclined to help and promote it. He also intimated in his letter, that he was resolved to go to England, to arrange for the settlement of the Jews.