6 surviving letters between Marcus Tullius Cicero and Publius Silius, spanning 50 BC.
“I commend to you Lucius Genucilius Curvus most warmly.”
“Publius Sestius, a man I hold in the highest regard, asked me to recommend to you his freedman, whose interests require your protection.”
“I was grateful to you in Atilius's matter: although I came in late, I nevertheless preserved an honorable Roman knight through your kindness.”
“I did not think it possible that I could run out of words, but in recommending Marcus Laenius I will.”
“My friend Nero thanked me for you in extraordinary, almost unbelievable terms.”
“I am very close and constantly associated with Publius Terentius Hispo, who is working in the pasture-tax business as deputy manager.”