He was in and out of my life ever since my mother attended a series of evening classes he taught in about 1970. He had a distinctive yellow raincoat so he was easy to spot out on field trips. His first marriage broke up because he was always shouting out historical events that corresponded to the time on the digital clock - 14:18, 16:50 etc. and this was 'unreasonable behaviour' apparently.
Sad loss.