If doubtful whether to end with "yours faithfully," or "yours truly," or "yours most truly," &c. (there are at least a dozen varieties, before you reach "yours affectionately"), refer to your correspondent's last letter, and make your winding-up at least as friendly as his: in fact, even if a shade more friendly, it will do no harm!
Lewis Carroll'Have some wine,' the March Hare said in an encouraging tone. Alice looked around the table, but there was nothing on it but tea. 'I don't see any wine,' she remarked. 'There isn't any,' said the March Hare.
Lewis CarrollSpeak English!' said the Eaglet. 'I don't know the meaning of half those long words, and I don't believe you do either!
Lewis CarrollYou have to run as fast as you can just to stay where you are. If you want to get anywhere, you'll have to run much faster.
Lewis Carroll