Myer Lyon was appointed meshorrer to Isaac Polack, hazzan at the Great Synagogue, London, in 1767 'at a salary of £40 per annum, on the understanding that he was to behave as a Yehudi Kasher '. Lyon's origins remain unclear. According to the memoirs of the actor James de Castro he was born in Frankfurt-on-Main and was invited to London by 'the German Jews', where 'a very rich Jew, Mr. Franks, instantly patronised him'. His voice having been brought to the attention of the aristocracy and the actor David Garrick, he was given permission by the synagogue elders to appear on stage, after which he returned to the synagogue and developed thenceforth a dual career. It is difficult, however, to reconcile this narrative with his known dates. The first record of him is in October 1760 where Garrick refers to him as 'ye boy Leoni' – he sang a role in Garrick's The Enchanter at Drury Lane Theatre which was 'received with great applause'. This suggests that Leoni could not yet have been in his teens at this time, and that therefore the story of his being summoned to London cannot be true. In fact it would be surprising if it were true since there is no evidence that the congregation there had any concerns about musical standards. The fact that the synagogue was only too happy to dock Leoni's pay by £8 a year in 1772, due to its financial problems, also argues against the congregation's supposed dedication to its cantor. It is therefore rather more likely that, wherever he was born, he lived in London from an early age and was talent-spotted, perhaps by Polack, in the synagogue.
Major roles
Leoni's twin-tracking in the synagogue and the theatre continued for some while. Between 1770 and 1782 he appeared quite frequently on the stage in London, where he scored great successes in Thomas Arne's Artaxerxes and, in the same year, as Carlos in Richard Brinsley Sheridan's The Duenna at the Covent Garden Theatre. The Morning Chronicle commented in its notice of The Duenna that 'it can never be performed on a Friday, on account of Leoni's engagement with the Synagogue', an indication of how crucial Leoni was to the piece's success.
Leoni's version of ''Yigdal''
Leoni also developed admirers amongst Non-conformist Christians. His reputation encouraged a number of Gentiles, including in 1770 the MethodistThomas Olivers, to come to the Great Synagogue on Friday nights to hear him. Olivers was so impressed by Leoni's moving rendition of the hymnYigdal that he determined to write words for a church hymn using the melody. The result was the hymn The God of Abraham Praise, which has had great popularity ever since. In the standard Church of England hymnal, Hymns Ancient and Modern, the tune of The God of Abraham Praise is still titled Leoni, after its source.
Society singer
Leoni's fame and talents turned out to be valuable in social terms to his congregation. Its wealthier members had taken to purchasing estates on the outskirts of London where they could live fashionable lives and hold soirées to which polite society could be invited. Integral to these was the quality of the entertainments provided, and Leoni was a star of appropriate calibre. In November 1774 he sang at the house in Isleworth of Aaron Franks, who was married to the daughter of another Jewish magnate, Moses Hart. The writer Horace Walpole was in the audience and gave a description which confirms the unusual qualities of Leoni's voice:
I was at a very fine concert at old Franks at Isleworth, and heard Leoni, who pleased me more than anything I have heard these hundred years. There is a full melancholy melody in his voice, though a falsetto, that nothing but a natural voice almost ever compasses. Then he sang songs of Handel in a genuine simple style, and did not put one in pain like the rope- dancers.
Opera promoter
Eventually in 1783 Leoni's success and his limited remuneration at the synagogue led him to change his career and chance his arm as an opera promoter as well as a performer. A rumour spread that Leoni was eventually dismissed by the synagogue for performing in Handel's Messiah, but the rumour remains unsubstantiated. He chose for his venture Dublin, where he had appeared in 1781. Leoni's 1783 season, undertaken jointly with the composer Giordani, proved, however, to be an utter disaster, and some newspaper reviews remarked on the fading of his voice, although he can only have been in his mid-thirties at the most.
Decline and emigration
Perhaps by this time audiences were beginning to tire of the unusual timbre which had first brought him popularity. From the financial consequences of this season Leoni never fully recovered. He appeared in 1787 in a benefit performance at Covent Garden Theatre, and had his last London benefit in 1788. After this he sailed to Jamaica to become hazzan to the Jewish community in Kingston, where he died in 1797. He is buried at the old Jewish cemetery in Elletson Road, Kingston.
Reputation
Clearly, however, his voice left a strong imprint amongst English music lovers. The satirist John Wilkins, in the year of Leoni's death, wrote: 'Neglected, appall’d, sickly poor and decay’d See LEONI retiring in life’s humble shade. ‘Tis but few little years since the charm of his voice Made theatres echo and thousands rejoice'.
