“Helen Levitt, a major photographer of the 20th century who caught fleeting moments of surpassing lyricism, mystery and quiet drama on the streets of her native New York, died in her sleep at her home in Manhattan on Sunday. … In his 1999 biography of Walker Evans, James R. Mellow wrote that the only photographers Evans ‘felt had something original to say were Cartier-Bresson, Helen Levitt and himself.'”