Yesterday, on what would have been the 104th birthday of Olivier Messiaen, we learned of the death of the pianist, musicologist, and literary critic Charles Rosen. Today, on what would have been the 104th birthday of Elliott Carter, whom Rosen knew so well, we heard of the passing of two major twentieth-century sopranos, Lisa della Casa and Galina Vishnevskaya. And late today came word of the death of Ravi Shankar. Wise words are being said about all of them in various corners of the Internet; I will add links as I find them.