A short story in which Slippery Jim DiGriz makes a brief appearance. PUBLICATION HISTORY Foundation's Friends: Stories in Honour of Isaac Asimov, edited by Martin H. Greenberg. New York: Tor, September 1989, p.307-320, ISBN: 0-312-93174-3, hbk. as: "La Quarta Legge della Robotica" in: Gli Amici di Fondazione (Fantascienza 2), October 1990. Milan: Sperling & Kupfer. Translated by Grazia Gatti and Tullio Dobner. [Italian] Foundation's Friends: Stories in Honour of Isaac Asimov, edited by Martin H. Greenberg. London: Grafton, 1991, pbk, p.389-406.