Administrative correspondence relating to the prisoner of war relief scheme set up at Birr Castle under the patronage of Lady Rosse; postcards and letters of thanks from the prisoners of war from Irish regiments (but predominantly the Irish Guards) interned in Germany; and acknowledgment postcards of parcels received from same.

Preprinted acknowledgment postcards sent by return by prisoners-of-war in German camps on receipt of relief parcels organised by the Birr Castle scheme. Personal details recorded include name, rank and internment camp.