Louisville Water Tower is the site of landmark research on water filtration. This well-known photograph of George Warren Fuller and his team, taken during the filtration tests, (1895–1897) always elicits questions on who the man in the middle of the back row is. He is known to us as only “William, the janitor.”
Louisville Water historian Jay Ferguson dug through the archives and said, “He most likely cleaned the laboratories and equipment and tended to other needs as Fuller requested. During the 19th century, Black janitors were usually viewed as invisible and silent employees.”