online sources for footnotes in syme's 'the roman revolution' – I (updated April 2)

Footnotes in Ronald Syme's The Roman Revolution are more often than not citations in Latin and Greek, mostly of Cicero, Appian, and Dio in the book's Chapters I through XII, relating to the first of our three chats.  For those who like to explore these more, especially Cicero's letters, here are those available online in the English translation:

• M. Tullius Cicero, Letters (ed. Evelyn Shuckburgh)
  (Volumes 3 & 4 mainly)
  
• M. Tullius Cicero, Letters to and from Brutus (ed. Evelyn Shuckburgh)
• M. Tullius Cicero, Orations, The fourteen orations against Marcus Antonius (Philippics) C. D. Yonge, Ed.

• The Histories of Appian, The Civil Wars on LacusCurtius
  beginning with Book II
• Julius Caesar's War Commentaries
• Cassius Dio on LacusCurtius beginning with Book 39
• Lucan's Pharsalia
  
• Sallust on LacusCurtius
• Tacitus, Annals

• Plutarch, Lives
• Suetonius: Divus Julius
• Suetonius: Augustus