New Gem | No More Learning

Would the dean
send me those letters, and mark over every sentence he would
leave out, I would copy and return them to him.

Word:

word

Question:

Why does the speaker want the dean to mark over every sentence he would leave out in the letters?

Answer (optional):

The speaker wants the dean to mark over every sentence he would leave out in the letters so that the speaker can copy and return them, indicating that the speaker wants to ensure that all the original letters are preserved and nothing important is left out.