15 surviving letters between Lucius Verus and Marcus Cornelius Fronto, spanning 161-166 AD.
“To my master.”
“To my Lord Verus Augustus.”
“(?”
“[The opening of the letter is lost.”
“To my Lord Verus Augustus, greeting.”
“To Verus Augustus, my lord.”
“To my Lord Aurelius Verus Augustus.”
“To the Emperor Verus, 1.”