to be from Ammudei Beit Yehudah (Judah Hurwitz, Amsterdam 1766). (However, Ammudei Beit Yehudah contains no reference to this story other than a brief mention of the execution of the elderly Rabbi Mann in Wilno). The story was then popularised through Russian translations, and there is evidence that a cult of Potocki's grave in Vilna has existed until the Jewish cemetery (at Pióromont also known as Snipiszki quarter) was destroyed by Nazis during World War II and later by the Soviets. Some sources claim his remains were rescued along with those of Vilna Gaon, though it is said that there is no modern monument or grave clearly identified as Potocki's in Vilna or elsewhere. However, historian Sid Leiman has identified what he thinks is a likely Potocki's grave by examination of the gravestones near the Vilna Gaon's. Tazbir stated that the tragic fate of Potocki, passed through Jewish oral tradition, remains unconfirmed by 18th-century Polish or Jewish primary sources and that there is no evidence in any archives or genealogy tree that Potocki existed. Tazbir further notes that the Polish nobility was guaranteed the freedom of faith (by acts like Neminem captivabimus and the Warsaw Confederation), and capital punishment was extremely rare. (though see also Iwan Tyszkiewicz). He observes that the incident, if real, should have caused an uproar among the Polish nobility (like an earlier and well-documented case of the execution of Samuel Zborowski), and would be the only historical example of execution by burning of a nobleman – yet no contemporary source from the Polish–Lithuanian Commonwealth mentions this event even in a passing reference. In addition, it is difficult to believe that the death at the stake of a Polish aristocrat, from one of the most powerful Polish magnate families, charged with a religious crime, was not echoed in any of the diaries or polemical writings concerning religion and tolerance, topics in which the Polish nobility, and the entire European Enlightenment, were particularly interested. Tazbir has concluded that "the court trial and death of Walentyn Potocki should be recognised as a historical legend deprived of all source–material foundations". Similar story of Abraham Isacowicz Some have suggested that the Potocki legend is an embellishment of a different story. A report published in the July 1753 edition of The London Magazine describes the story of a very similar execution. The correspondent dated his report 11 June, two days after the