This biography assesses Henry Horne's relationship with Haig and the Canadian Corps. It also evaluates his contribution to the technical advances of the artillery during the war and describes the battles which he conducted. It attempts to accord to Henry Horne the recognition and credit that he deserves but which has been withheld. Whether or not Henry Sinclair Horne was the 'silent' General he might lay claim to being the 'forgotten' General of the Western Front. His self-effacement in a profession not renowned for shrinking violets undoubtedly made its contribution to his relative anonymity-- he wrote no memoirs nor kept anything more than sketchy diaries.