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I would like to know if the ashes of Langston Hughes are in the Schomberg Library, located in Manhattan (Harlem), NYC?

Someone inquired about Langston Hughes burial place, or more exactly, if his ashes were in the Schomberg library. Yes! they are. Here is more info:
The Langston Hughes Auditorium in the Schomburg Center for Research in Black Culture; the artistic significance of the cosmogram on the floor of the auditorium; Cosmogram is entitled Rivers and it is based on Hughes's signature poem; the cosmogram illustrates Hughes's poem, The Negro Speaks of Rivers, as well as traces the lifelines of Schomburg and Hughes; Hughes's ashes are buried beneath the center of the cosmogram where it says, "My soul has grown deep like the rivers."