(my favorite is the P.S.. It is difficult to get proper spies when they can't read, I would think)
spies only club
Dear my special agent,
You are not listening when I call you so I am writing you a letter.
We need proof that moo-moo (my Oma) is in the shower.
My plan is I call you and I put my phone next to the door of the bathroom.
Then you stay on the phone to listen to see if it is really moo-moo.
After a while I will come to your office and you tell me what you heard.
Your best agent Frances
p.s. If you can not read let Oma read it