There are multiple English-language sources, Gargoyle and friends,
to corroborate the statements posted.

A Dublin periodical, titled the Public Advertiser, is quoted below: to be accurate, this notice is later than the famous premiere performance in Dublin. In fact it took place just after Handel had died peacefully of natural causes.

"From the Foundling Hospital: -- in GRATEFUL MEMORY of George Frederick Handel, Esq., on Thursday, the 24th day of May, at the chapel of the Hospital, under the direction of Mr. John Christopher Smith, will be a performance of SACRED MUSIC, which will begin at exactly 12 o'clock at noon. Tickets, half a guinea each. Mr. Stanley will, on this occasion, perform a concerto on the organ. Gentlemen are desired to come without swords, and ladies without hoops. Books may be had at the Hospital, price sixpence."

--footnote: Public Advertiser, 22nd of May, 1759.

--page 334, Chapter X, The Life of Handel translated from the original French by Mr. James Lowe, the original French written by Victor Schölcher. London: by special appointment music publishers to their Majesties Queen Victoria and the Emperor Napoleon III, Robert Cocks & Co., New Burlington Street, 1857.
May be viewed at Google Books.