He was the author of one of the treatises in _Sepher Pene Rabah_ edited by Manasseh Ben Israel ... Amsterdam 5388, and also wrote _Sepher Ohel Ya’acob_ and _Sepher Kizur Zizath Nobel Zebi_, which were published together at Amsterdam 5497, against the adherents of _Sabbatai Zebi_ (1626‒1676). His stay here was of short duration――not quite two years. He left the country to escape the plague which was then raging, and subsequently, in 1681, became the Ecclesiastical Head of the _Sephardi_ Jews in Amsterdam. It is noteworthy that two of these friends of Manasseh, Aboab and Sasportas, were particularly interested in the Messianic hopes, though from different points of view. Aboab, a _Cabbalist_, whose religious poetry is remarkable for chaste diction and wealth of imagination, was supposed to be a secret _Sabbatian_, while Sasportas, sober-minded and a strict _Talmudist_, was strongly opposed to the mystical tendencies of pseudo-Messianism, and hoped for the restoration in the traditional way. ¹ Two of these letters have been published by _Heer_ J. M. Hillesum, in his article “Menasseh Ben Israel,” in the _Amsterdamsch Jaarboekje_, 1899, _pp._ 27‒56. ² Manasseh in her honour published in Portuguese:――Oracion Panegirica a su Magestad la Reyna de Suedia. Amsterdam, 1642. _4to._ ³ The Resurrection――Revealed Raised Above Doubts & Difficulties. In Ten Exercitations.... By Doctor Nathanael Homes.... London, Printed for the Author, A.D. 1661. ⁴ Wrote one of the “Aprovaciones” for “La primera parte del Conciliador enel Pentateucho, 1632.” “Del excelente Señor Doctor Joseph Bueno, Philosopho, y Medico preclaro.”: and also a SONETO which appears on the ninth introductory leaf of “Menasseh Ben Israel De La Resvrreccion De Los Mvertos, ... En Amsterdam, En casa, y à costa del Autor. Ano. 5396. de la criacion del mundo.” (_12mo._ 12 _ll._ + 187 _pp._ + 1 _l._ [I. S.] ⁵ At the joint expense of Ephraim Bueno and Jona Abrabanel (who both contributed SONETOS to De La Resvrreccion De Los Mvertos) the _Sepher Pene Rabah_ [I. S.] was issued at Amsterdam in the year 5388. It was edited, re-arranged and printed by Manasseh Ben Israel. Jona (_ob._ 1667) Abrabanel was a poet, and son of Dr. Joseph (_ob._ 1620?) Abrabanel, a physician in Amsterdam, whose sister Rachel was the wife of Manasseh Ben Israel. Their father, Isaac Abrabanel, a scientist (_ob._ 1573), lived and died in Ferrara, Italy, and was on intimate terms with the famous _marrano_ physician, Juan Rodrigo _de_ Castel-Branco [Amatus Lusitanus] (1511‒1568). He was the son of Joseph Abrabanel (1471‒1552), a doctor of medicine, born at Lisbon and died at Ferrara, whose father, _Don_ Isaac, was the illustrious Bible commentator and statesman. Illustration: _Dr._ EPHRAIM H. BONUS  _Dr._ ABRAHAM ZACUT