Three African stories
BLACK HEART, WHITE HEART first appeared in the New Year's Number of THE AFRICAN REVIEW for 1896. Charles Kerr provided 6 illustrations.
McKay, Scott and Whatmore all agree that the first edition in book-form was published May 29, 1900 by Longmans, Green, and Company in London. Apparently 10,000 copies were printed, using the same 6 Kerr illustrations.
The first British edition also contains two more stories: ELISSA, THE DOOM OF ZIMBABWE, and THE WIZARD.
ELISSA first appeared serially in THE LONG BOW between February 2 and June 9, 1898, and 33 illustraitons by F.H. Townsend were included.
ELISSA appeared first in book-form in this Longmans British edition, but with only 8 of Townsend's illustrations.
See the page I created for THE WIZARD, first published in 1896.
See the VisualHaggard.org page dedicated to the illustrations found in various editions.
I do not own any of the books on this page.