Who gave Larry's letter to Ann, and why didn't she read it before the story started?

"suisde Lary's Letter" ? Please re-type your question. Thanks

The Letter that Ann is Reading to Kate at the and of the story that Larry says: "My Dear Ann: it is impossible to put down the things I feel. But I've got to tell you something. Yesterday they flew in a load of papers from the States and I read about Dad and your father being convicted. I can't express myself. I can't tell you how I feel... I can't bear to live any more. Last night I circled the base for twenty minutes before I could bring myself in. How could he have done that? Every day three or four men never come back and he sits back there doing 'business'.... I don't know how to tell you what I feel.... I can't face anybody... I'm going out on a mission in a few minutes. They'll probably report me as missing.  If they do, I want you to know that you mustn't wait for me. I tell you, Ann, if I had him there now I could kill him..."

Ann always had the letter and knew this, she just did not want to destroy the family by revealing this information.