sentences:  The artist engraved the coins himself.He also designed the British Privy Council Seal, the HM Greater and Lesser Signets as well as the seals of the British Medical Association and the Royal Society of Arts.With the outbreak of World War II, Gardner was soon posted to the Army Camouflage Development and Training Centre at Farnham, where he became involved in the training of 7,000 men of all ranks.