Mahler’s fourth symphony culminates in the last-movement setting of the anonymous folk poem, “Das himmlische Leben” – “life in Heaven” – which he had written and rejected for the Third Symphony. His works of 1899/1900 started to spill into each other. Last Saturday’s London Symphony Orchestra Prom grew in easy antici­pation of this finale, the Swedish soprano Camilla Tilling floating on in elegant black haute couture after the “ohne Hast” (“without hurry”) scherzo to sit motionless through the “ruhevoll” (“peaceful”) slow movement until her cue. She sang with simple, clear beauty the arching melodic line, her consistent, straight tone an expressive vehicle for the text’s gentle humour