Note 53 — XXXIII to XXXVII. KENTISH TOWN—PREPARING FOR ITALY.
Reading edition
This seems to mean that he wrote the letter to the end, and then filled in the words My dearest Girl, left out lest any one coming near him should chance to see them. These words are written more heavily than the beginning of the letter, and indicate a state of pen corresponding with that shown by the words God bless you at the end.