He was for a number of years Secretary to the Syndics of Cambridge University Press.
With Arnold Glover he edited the collected works of William Hazlitt, 13 volumes, 1902–1906.
He also edited the works of Samuel Butler, Abraham Cowley, Richard Crashaw, and Matthew Prior, 1904–1905.
[1] Waller and A. W. Ward were the joint editors-in-chief of The Cambridge History of English Literature, 14 vols., 1907–1921.
Waller married in 1890[1] and his wife contributed to volumes one, seven, and eight of the translations of Molière's plays.