 Complete the following phrase:  Colonel Caleb Grafton Roberts MC 31 January 1898  23 November 1965 was an Australian civil engineer and army officer. Born in New South Wales, he was the son of English-born Australian artist Tom Roberts. Roberts relocated to London with his family in 1903 and joined the British Army during the First World War. He served as an officer of the Royal Engineers in the Palestine campaign and on the Western Front. After the war he fought in the 1919 