The Boy Timeline and Summary

The boy is staying with Great-Aunt Sophy while he recovers from the rheumatic fever he contracted in India.
Our nameless protagonist meets Arrietty and they become friends. She promises to read to him and he promises to deliver a letter to her family because that's what friends are for.
Rain or shine, the mail will get delivered on time. The boy risks punishment by Mrs. Driver when he delivers a letter to Arrietty's family in the badger sets in the fields.
Busted! Pod catches Arrietty and the boy hanging out.
Using a screwdriver, the boy lifts the roof of the borrower family's house to bring them presents from the dollhouse, and so begins a beautiful friendship of borrowing.
Unfortunately, Mrs. Driver catches the boy helping the borrowers and locks him in his room. No good.
The boy escapes from Mrs. Driver's clutches, grabs a pickax, and knocks a hole in the grate so the borrower family can breathe fresh air and not the toxic fumes of the rat-catcher.
Beep-Beep! Just after the boy's act of heroism, a taxi arrives to take him back to India and his family.