1) "I haven't read so interesting a book since I don't remember when" She said
=> She said that she hadn't so interesting a book since she didn't rememberwhen.
2) "John left here an hour ago" She said to me.
=> She told me that John had left there an hour before.
3) "Jim's arriving at our house tomorrow" She said to me.
=> She told me that Jim was arriving at her house the day after.