Who is Edward Marsh from The Eye in the Door and what is their importance?

Edward Marsh (1872 - 1953) is another historical figure who makes an appearance in The Eye in the Door. In the narrative, Marsh is a professional associate of Charles Manning. In reality, Edward Marsh worked as a civil servant and translator during the period covered in the novel. At one time, Edward Marsh was served as Private Secretary to Winston Churchill. Edward Marsh was also a patron of the arts. Poet Siegfried Sassoon is one of the artists who received support from Marsh.