Apollonius: Books I to III.
Pay particular attention to:
Book I, Definitions and Propositions 1-4, 11 and 46;
Book II, Propositions 29, 44 and 45, and
Book III, Proposition 52.
V.J. Katz, A History of Mathematics, Section 3.5, on Apollonius.
J. Fauvel and J. Gray, The History of Mathematics, 4D5-7. (On reserve.)
On to Day 26.