Dr. de Sola’s ability in the pulpit led to his frequently being invited to lecture in the United States, where he had acquired much prominence and popularity. On the 9th of January, 1872, he was invited by General Grant’s government to perform the ceremony of opening the United States congress with prayer, and for the first time was witnessed the unique spectacle of one who was not a citizen of the United States nor of the dominant belief officiating at the opening ceremonies at the assembling of congress at Washington. The broad liberality of this act, upon the part of the United States government, was fraught with particular significance at that time, owing to the fact that diplomatic relations between Britain and the United States had then but lately been strained to dangerous tension by the “Alabama Claims,” and this high compliment to a British subject was the first evidence of the growth of a better feeling between the two countries. Sir Edward Thornton, the British ambassador at Washington, formally extended to Dr. de Sola the thanks of the British government, and Mr. Gladstone--then prime minister, also personally communicated his satisfaction. Upon the death of Isaac Leeser, Dr. de Sola purchased the stereotyped plates of his works and issued a new edition of that author’s translation of the Bible according to Jewish authorities. He also brought out a revised translation of the Jewish Forms of Prayer, in six volumes, based upon the editions of D. A. de Sola (his father) and of Leeser. He was invited to become the successor of Mr. Leeser in his ministerial office but declined. He had previously refused several similar offers. Dr. de Sola’s onerous duties were at this time further increased by his being offered the chair of Hebrew at the Montreal Presbyterian College, and later on he accepted the appointment of lecturer in Spanish literature at McGill University, a literature and language with which he was specially familiar and to which he was particularly attached. But such incessant application to work could not but prove exhaustive, and his naturally vigorous health broke down under the strain. A year’s rest, spent in Europe, proved sufficiently beneficial to enable him to return to some of his duties. For a while he also resumed his contributions to the Jewish press, and among other interesting writings we notice his “Yehuda Alcharizi and the Book Tachkemoni.” In 1880 he published his last important work, “Saadia Ha-Gaon,” a book giving a very valuable description of the writings and life of one of the greatest of Jewish philosophers and also containing an interesting account of the court of a prince of the captivity.