You will never guess who I received a letter from today: none other than your friend Sirius Black. Have you told him about me, or has he somehow discovered our correspondence? If this letter has been intercepted, I should like to tell him right now that he is a nosy git.
However, if it is safe to write to you, Remus darling, please let me know at once. If I do not get a satisfactory response (and believe me, Mr. Black, I will recognize any attempts at impersonation), I shall think of some other way to contact you.