Go into almost any kind of office, open a filing cabinet, bypassing the external correspondence, with its pleading letters from unpaid suppliers, complaints from customers and unopened junk mail, and take a look at the internal documents (of course many of them are e-mails, sent electronically and never printed out, so you might have to dip into the computer files too).
There, you will doubtlessly find examples of long tedious memos padded out to make what should have been brief, basic points into rambling, interminable essays of self-importance—those that, as the Americans say, “uses fifty-cent words to make five-cent points.”
You will also find brief, terse, memos.
Others will be protective, accusing or defensive. Some will be designed ...