Eighty-eight handmade microscope slides prepared by G V Black are discussed. Black sectioned tissues using a homemade microtone and razor blades. Different sections of the same material were stained with various stains or double stained. Because of the importance of Black's writings, it was interesting to find slides that he prepared, to try to compare them to his publications, to study the way in which he obtained information, and to find the conclusions he drew from his experiments.