In Adam Gussow's Beyond the Crossroads: The Devil and the Blues Tradition, he mentions Francis Grimké 's 1892 critique of his fellow African American peers in pastoral offices. Gussow cites a book edited by Thabiti Anyabwile and John Piper.
The Faithful Preacher: Recapturing the Vision of Three Pioneering African-American Pastors
By Thabiti Anyabwile, Foreword by John Piper
https://www.crossway.org/books/the-faithful-preacher-tpb/
ISBN-10: 1-58134-827-4
ISBN-13: 978-1-58134-827-9
ISBN-UPC: 9781581348279
Published: March 31, 2007
It turns out that now you can go straight to the source but I'll get to that after a few rabbit trails.