The fourth ship to carry the name HMS Cossack earned the first Battle Honour for taking part in Belgium coast Operations 17 October 8 November 1914.
The contents include copies of the original building contract and detailed drawing for launching and layout of decks and machinery. She was taken over from the contractors on 2 April 1908 and served until 1919. Her top speed was 34.619 Knots – 39.839 mph which is not far off a modern day ships speed.