page note 298 * “The unique status of Euclid as a text book in England may be said to date from the publication of Robert Simson's Elements of Euclid, which first appeared in Latin and in English in 1756” (Heath).

page note 298 † A Manual of Greek Mathematics by Sir Thomas L. Heath, p. 231 (1931).

page note 299 * In VI.28 it is a necessary condition (covered by the enunciation) that the given rectilineal figure must not be greater than the parallelogram described on half the line and similar to the defect. This follows from VI.27 which is a generalised proof of the particular fact that the square on half the line is the largest rectangle that can be constructed from any two parts of the line.