 Alongside his dramatic Cubist work, Roberts was a talented portrait painter.He honed his skills with portraits of Sarah – she would be his model and muse for the next 60 years.In 1923, while Roberts was preparing for a one-man show at the Chenil Gallery, Chelsea, the artist Colin Gill put Roberts in touch with T. E. Lawrence, who commissioned a series of portraits for his book "Seven Pillars of Wisdom".