Who is Mister Sparks from Harlem Gallery and what is their importance?

Mister Sparks writes the Harlem Vignettes. It is a sub-poem within the Harlem Gallery that tells little stories of its characters. Mister Sparks is the narrator in the Harlem Vignettes. He is a conductor with the Harlem Symphony Orchestra, but never receives praise for his work. He dies and finally receives praise for his poetry, the Harlem Vignettes, after his death.