The life of Daniel Tourneur goes down in Harlem's history, as seen in "New Harlem past and present; the story of an amazing civic wrong, now at last to be righted", by Carl H. Pierce, W.P. Toler, and H.D. Nutting, 1903, from pages 297-299:
You can find this book at Archive.org by clicking here.
See Daniel Tourneur's profile page for more details about his life.
See the Dykeman page for more on this branch of my family.