The Herbert Hoover Presidential Library and Museum's entire collection of decorated Belgian Relief flour sacks from World War I was subjected to a close examination in June 2022. Annelien van Kempen, visiting researcher from The Netherlands, and Marcus Eckhardt, Hoover Presidential Museum curator, studied every detail and counted 360 items in this unique survey of war-time American and Canadian flour sacks, decorated by Belgian schoolgirls, women and artists, mainly in 1915.