A late 19th century edition of Euclid’s work on geometry for use in English schools.
A Text Book of Euclid’s Elements for the Use of Schools. Books I-VI and XI by H.S. Hall, M.A. and F.H. Stevens, M.A. (London: Macmillan, 1898).
The text is in the public domain.
Another of the leading scientists of classical antiquity and also following in the Platonic tradition, he is credited with anticipating modern calculus, among others.
Another ancient mathematician and theoretical predecessor of Euclid.