Buried in Belgium

Finally, in September 1917, a letter from the Red Cross in Geneva:
We think, in continuation of our previous letters, that is may be of interest, naturally, to you to know that the grave of Pte. Matthew Rae is numbered 628 in the cemetery at Kortry K.
With renewed expression of sympathy
We are Sir
yours faithfully
Comite Internationale de la Croix Rouge
Geneve
Agence Internationale des Prisonniers de Guerre
British Section
The cemetery where Matthew Rae was buried is now known as Kortrijk (St. Jan) Communal Cemetery in Belgium. The website of the Commonwealth War Graves Commission provides a specific reference to Grave A.56.