The "Lobgesang" ("Hymn of Praise") was written at Leipsic in 1840, the occasion which gave birth to it being the fourth centennial celebration of the art of printing. The musical features of the festival were intrusted to Mendelssohn, the ceremonies occupying two days, June 24 and 25 of the above year. On the evening of the 23d there was a performance of Lortzing's opera, "Hans Sachs," written for the occasion. On the morning of the 24th there was a service in the church, followed by the unveiling of the statue of Guttenberg in the public square, and an open-air performance of the composer's "Festgesang" for two choirs, with trombone accompaniment, David conducting one choir, and Mendelssohn the other. In the afternoon of the 25th the "Hymn of Praise" was given for the first time in St. Thomas's Church, preceded by Weber's "Jubilee Overture" and Handel's "Dettingen Te Deum." Lampadius, who was present at the performance, says:-- "The work called out the greatest enthusiasm, which could hardly be repressed within bounds even by the fact that the audience were seated within the walls of a church. After the first duet a subdued whisper of applause ran through the edifice and betrayed the suppressed delight of the listeners. On one of the evenings following, a torchlight procession was made in honor of the great composer. Mendelssohn, who then lived in Lurgenstein's Garden, appeared at the window, his face lighted up with joy. 'Gentlemen,' he said in his neat, quiet way, with a sensible trembling of the voice, 'you know that it is not my manner to make many words; but I heartily thank you.' A loud 'Hoch!' three times shouted, was our reply." Its next performance was at Birmingham, Sept. 23, 1840, Mendelssohn himself conducting. After this performance it was considerably changed, and the whole scene of the watchman was added. The idea occurred to him after a sleepless night, during which, as he informed a friend, the words, "Will the night soon pass?" incessantly came into his mind. The title given to the "Hymn of Praise," "a symphony-cantata," was first suggested by his friend Carl Klingemann, of London, as will be seen by the following interesting extract from a letter written by Mendelssohn to him, Nov. 18, 1840:--