It must be borne in mind that there exist no primary sources coverin early Greek and that we rely chiefly on manuscripts and accounts dating from Arabiau and Christian times. With great ingenuity. patience, scholars of classicism have reliably restored many of the origi nal texts such as those of Euclid, Apollonius, Archimedes, and others. From painstaking text criticism, from remarks by later commentators, and from many fragments and scattered notices by later authors and philosophers, 6ome sort of consistent, although largely hypothetical, account of the history of early Greek mathematics is now known. A debt is owed, alongthese lines, to the profound and scholarly investigations of such men as Paul T L Heath, H. G. zeuthen, A. Rome, J. L. Heiberg, snd E. Frank.