Dorothy Mary Shilston was a missionary and teacher. She arrived in Canton in 1929 and the following year was appointed teacher at Ying Wa Girls' School.
After the fall of Hong Kong, she was interned at Stanley Camp. Postwar, Dorothy Shilston acted in a temporary capacity as headmistress of Ying Wa Girls' School after its reopening in October 1945.
Source
1. https://www.chinafamilies.net/internees/9659-shilston-dorothy-mary/
2. SOAS, University of London. See here and here
3. Ying Wa Girls' School History: https://www.ywgs.edu.hk/school-history
4. Dorothy Mary Shilston's name/signature appears in brown at centre left under "School" 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