Notes on Omar Khayyám (1050-1123) and recent discoveries. R.C. Archibald.
Pi Mu Epsilon Journal 1 (1953) nr. 9, p. 351-358.

Up to a decade ago, Omar was regarded by scholars as a comparatively minor Persian poet. But within the past three years this view has been shown to be entirely wrong. Two new manuscripts of Omar’s poetry have been found, and one of them dated only 85 years after Omar’s death. From these Professor Arberry, of the University of Cambridge, has discovered that Omar was regarded by Persians as one of their greatest poets, and that the existing quotations point to an original corpus of at least 750 quatrains.