"Great Work of Time" is a novella by John Crowley. A science fiction story involving time travel, it concerns a secret society endowed by the will of Cecil Rhodes, modeled on the well-known Catholic order of the Jesuits whose aim is to preserve and expand the British Empire. It is a known historical fact that an early version of Rhodes' will did indeed call for the creation of such a secret society, though — as far as is known — it never came into existences. The story was also published as part of a collection of short stories in A Science Fiction Omnibus in 2007, edited by Brian Aldiss.