 In 1930, Hewitt was appointed Art Assistant at the Belfast Museum and Art Gallery, where amongst other duties, he gave public lectures on art, at one of which he met Roberta "Ruby" Black, whom he was to marry in 1934.Roberta was also a convinced Socialist, and the couple became members of the Independent Labour Party, the Belfast Peace League, the Left Book Club and the British Civil Liberties Union.Hewitt began experimenting with poetry while still a schoolboy at Methodist College in the 1920s.