Mengelberg, Willem. (1871-1951) Signed PhotographSigned photograph of the important conductor, friend and advocate of Mahler, Strauss, Schoenberg and Reger. Shown surrounded by a group of colleagues and holding the score to a Te Deum, Mengelberg has signed on the mount below the image and dated May 2 9, 1935. He has also penned a caption in Dutch above the image. Heavy water damage to a portion of the photograph and overall toning and foxing; otherwise in good condition. Photograph 7 x 5 inches (17.