Albert Battandier, Catholic Encyclopedia (1913)
“ In writing to an Italian cardinal, the letter should begin with the words, "Most Reverend Eminence" (Eminenza Revma.) ; if he should be of a princely family, "Most Illustrious and Reverend Eminence". In the body of the letter itself he should always be addressed in the third person and as "Your Eminence", or "His Eminence", and the letter should end: "Embracing the purple of His Most Reverend Eminence, I am His Eminence's very humble and obedient servant". ”
