Alexander Buchman Alexender Buchman was a guard at Coyoacan in late 1939-early 1940, when he was replaced by Sheldon Harte. Buchman worked as a consulting engineer. Van Heijenoort Remembered Against the Current, No. 12-13, January-April 1988 Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on WhatsApp (Opens in new window) WhatsApp Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print