[1] This has, indeed, been conjectured to be an error for Ἥρωνος ἢ
Κτησιβίου, but Baldi (in his edition of the Belopœica, p. 44,) has
satisfactorily proved that Hero was the writer.
[2] That Ctesibius began his researches at an early age may be inferred
from the fact mentioned by Vitruvius, ix. 9. (edit. Schneider.)
[3] On Vitruvius, x. 7. The sections of Hero and the corresponding
chapters of Vitruvius are minutely compared by Schneider, Vitruv. vol.
iii. pp. 283–330.
[4] Baldi arrives at the same conclusion: (p. 74) “Cæterum haud
immerito quispiam dubitaverit quam ob rem Architectus Heronis nostri
nomen silentio præterierit. Nos ideo factum putamus quod ille Ctesibio
utpote inventori ea tribuere maluerit quæ ab Herone locupletiora et
illustriora quam ipse a magistro accepisset evulgata fuere.”