Donald Sinclair Jamieson was born in Winnipeg, Manitoba in June 1924.  He enlisted with the RCAF and served with the 426 Squadron.  On December 16, 1943, while returning from a mission over Germany, his Lancaster crashed on return to England.  Five crew members were killed immediately, one later died of injuries, and Jamieson walked away with only ten stitches (see his letter of December 1943).  While returning from a mission over Germany on June 28/29 1944 his his Halifax was shot down, but all the crew bailed out successfully over France and were sheltered by French citizens of the village of Honguemare.  Jamieson and another crew member were captured on July 14 and held in prison.  They were taken out of the prison on the night of August 21, 1944 and executed.  Their bodies were never found and they are commemorated on the Runnymede Memorial.  Jamieson was twenty years old at the time.  The collection currently consists of two letters and one photograph.

External links:
Flying Officer Donald Sinclair Jamieson’s service record (Serv/Reg# J19863) can be viewed/downloaded in pdf format through Library and Archives Canada.
Burial information is available at the Commonwealth War Graves Commission.
A memorial page honouring Jamieson can be visited online at the Canadian Virtual War Memorial.