Jean M. Barr was an American missionary and a registered nurse serving the leper colony of the Reformed Presbyterian Church in Loting, Kwangtung (Luoding, Guangdong), China.
During the Battle of Hong Kong, she was stationed at La Salle Relief Hospital. After the fall of Hong Kong, she was interned at Stanley Camp and later repatriated with other Americans in 1942. In 1955, she married Wilber Raymond McWhinney. Jean M. Barr died in 1982.
Jean Barr's name/signature appears under "La Salle College" (La Salle Relief Hospital) on the right on the "Day Joyce Sheet" held by the Imperial War Museum.
See: https://www.iwm.org.uk/collections/item/object/30083388. An explanation of the "Day Joyce Sheet" is given at: https://gwulo.com/media/46458
Source
1. Memorial: https://www.findagrave.com/memorial/110642026/jean-mcwhinney
2. http://www.hongkongwardiary.com/searchgarrison/nonuniformedcivilians.html