// TRANSMISSION INTERCEPTED
Your first intercept, Agent.
Decode it and it will tell you where to go next.
// INTERCEPTED TRANSMISSION
// FIELD NOTE
"If he had anything confidential to say, he wrote it in cipher — that is, by so changing the order of the letters of the alphabet, that not a word could be made out." — Suetonius, The Twelve Caesars, 121 AD