At a wedding last night, the Kallah’s brother, while singing, noticed Rav Avrohom Katz and Rav Elya Nota Katz, father of habochur Chaim Tzvi Katz z”l, and immediately launched into Chaim Tzvi’s niggun, the song bringing comfort and solace to the bereaved father, making sure that Chatzi’s song – literally and proverbially – carries on….