… Iran Scholar With a Monumental Vision, Dies at 98 Sept. 18, 2018 Ehsan Yarshater, an eminent Iranian historian who … started his project at 52 and worked for 12 hours a day until his mid-90s, retiring last year at the letter K. … his encyclopedia when he was 52 and worked for 12 hours a day until his mid-90s, stopping at the letter K. Marcus Yam …