Whats the passage? I need to know the passage in order to answer ^_^
Well I can't see the letter however there is many things that need to be done before sending a letter. Like signing it or writing who it's getting sent too. Those are the two biggest things to look at before sending a letter. Spelling errors as well, depending on who the letter is being sent to.
Visually descriptive or figurative language, especially in a literary work.