How very sad. Yes, obviously death eventually comes for each of us--Mahler constantly reminds us of this. But almost always, the arrival is too soon for someone (or MANY "someones")
Henry-Louis was the epitome of a scholar, with his unquenchable desire to learn more and more. From my personal communications with him, I found him to be what was often said, in describing Gustav Mahler: "a saintly person," though he would probably blush and protest at such a compliment, true as it is.
He lived the life he chose; and we are richer for it.