Related Clues:

• It is exemplified in a letter of Lord Macaulay
• Part of letter from a person who posted it, say
• Climber needs a transmitter for radio communication
• Upright and superior, for a man of letters
• Top part of lower-case letter such as b or d
• Part of letter one posts, say
• A person posting a letter, we hear -- someone coming up the hill?
• Lower case letter extending upwards as b or f
• Top part of a tall lower-case letter
• A correspondent welcoming the beginning of chatty part of letter
• Upper part of letter or card seen when sorted