Jowett served with the Royal Garrison Artillery during the World War I, seeing action in Flanders and France. In 1920 he was one of the founder members of the 7 & 5 Society. The painter H.A.Finney remembered him as ‘a distinguished personality and this was a significant event for the school; he had returned from the war and at times suffered from shell-shock. He visited the school two or three days a week and by the inspiration of his teaching gained our confidence and almost hero worship, transferring his own enthusiasm for drawing, and the beauty of classical construction of the human figure, to all who came under his instruction. I remember still with clarity, his beautiful selective demonstration drawings, which we eventually cut out and treasured.” (Unpublished Autobiography of Hugh Finney, 1971, quoted by kind permission of Nicholas Finney)