 Working as assistant conductor at the Munich court opera , he looked for a librettist for a possible opera project and contacted Bierbaum . While no opera came to pass , Strauss liked his poems and set several of them to music , among them the three songs of Op. 29 which he all wrote on 7 June . Traum durch die Dämmerung was followed by <unk> Herzen ( " Longing Hearts " or " Beating Hearts " ) and <unk> ( Nighttime Walk ) . 
