The Internet Archive has a preservation copy of this work in our general collections.
R. S. Conway. "The Sixth Book of the Aeneid The Sixth Book of the Aeneid. Edited by H. E. Butler, M.A., Professor of Latin in the University of London. Pp. viii + 288. Oxford: Blackwell, 1920. 12s. 6d." The Classical Review 35.7-8 (1921) 163-167