[1] He served in France during the First World War and was awarded a Military Medal for gallantry at the Battle of Vimy Ridge.
[6] In 1944 Capell went to Greece with Brig Turnbull and the Aegean Raiding Force on a trip to Khios and Athens.
He was in Athens when Winston Churchill arrived on Christmas Day 1944 to hold talks with ELAS and other Greek patriots.
His book Simiomata (Greek jottings) about his experiences and his understanding of the Dekemvriana is an important contemporary account of these tumultuous days and somewhat contradicts the views expressed by Geoffrey Hoare, The Times correspondent (also published in The Manchester Guardian).
[9] Capell made English translations of many songs by Schubert, Schumann, Grieg and Wolf.