Synthesized answer
The author provides evidence in the form of Socrates' own defense, which includes his recounting of the Oracle at Delphi and his cross-examination of Meletus [Passage 1]. This defense constitutes the first part of "The Apology" [Passage 1].
The passages do not provide further details on the specific evidence presented by Socrates beyond these mentions.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
Title: The Apology, Phaedo and Crito of Plato; Golden Sayings of Epictetus; Meditations of Marcus Aurelius by Charles William Eliot, Πλάτων, Epictetus --- Google Books --- Title: Apology by Plato Description: The Apology is Plato's version of the speech given by Socrates as he defended himself in 399 BC against the charges of "corrupting the young, and by not believing in the gods in whom the city believes, but in other daimonia that are novel . Apology here has its earlier meaning (now usually expressed by the word apologia ) of speaking in defense of a cause or of one's beliefs or…