Start your letter of complaint - especially if it isn't the first one - like this dude in 1853:

"It is with the utmost unwillingness that I again find myself called upon to draw your attention to..."

A different author, after waiting 5 months without a reply, presents the same basic idea (answer me, damn it!), though with greater deference (this time in 1854):

"I have the honor to inform you, with all due respect, that I have, since that time, been anxiously expecting to be favored with an answer on the subject, but having been disappointed in my expectations so far, I find it necessary again to submit the matter for your consideration."

@brian_gettler @dairpo <bookmarks for future reference …>
@brian_gettler Old timey way of saying "I hope this letter doesn't find you well"