Thank you all for your input so far. This was not my first contact with the neighbor, we spoke to each other a few times before this. I wouldn't consider them "elderly". On one occasion her husband volunteered that if their t.v. should bother us, because it is often loud (his own words), we only have to let them know. The pie was wrapped very securely and packed in a tied plastic bag, and the card was taped to the outside. I made it clear that it was from myself; it was not "anonymous". I would have tied it to the doorknob but a screen door blocked that. In my old apartment I routinely welcomed new neighbors with a card and a bag of cookies or pumpkin bread, and every one of them appreciated it. This noise issue occurred every day for two weeks. I needed to inform her somehow, and while "in person" may be the ideal way to do this, I did nothing to cause her to react the way she did. With my hours being so different than hers, I couldn't easily talk to her face to face. And feeling so exhausted and touchy about this, I chose to write because I wasn't sure if I could handle "face-to-face" if she wasn't receptive.
These sounds are not routine "getting ready for work" sounds. These are sliding, banging, dropping, and on two mornings, someone was hammering nails into the wall. The room on the other side of my bedroom wall is not their bedroom, it is their home office. I have been an early riser most of my life; I am aware that people have to get up early to go to work, etc. These are not drawers being opened. And when I say I hear her yelling angrily at her husband, that is what I meant. Unfortunately I often can hear what she is saying.
I have been looking into soundproofing. My landlord already thought my asking for a peephole and a deadbolt was odd (we live in the country). I literally looked at hundreds of properties, and this was the best thing I could afford. I am seriously considering moving where I sleep, but I have to replace my bed to do that.
The main reason I consulted this forum is that, now that this has already happened, I am concerned about having a peaceful coexistence with my neighbor, because I want our home to be a place of rest to come home to...(and I don't want to have to skulk around trying to avoid my neighbor). I appreciate your thoughtful and honest opinions.