The Tagesanzeiger daily almanac of Prague social and musical events published by Prager Morgenpost 29/12/1863 noted: ‘Singing evening [Gesangsabend] of „Flöte“ on the Žofín Island (commencing 8pm).’ No further details of this event were given by the source. The ‘Singing evening’ would have comprised performances of choruses and songs by members of Flöte.