I would like to know what the average wait is between the time you send a letter and the time you receive that letter back. I sent out a couple letters three weeks ago and would like to know when to expect to get them back. Thanks Again!

I want to find some pictures to send to my favorite famous people, but i can't find decent pictures to send to them. Can anybody give me a good place to get pictures? Thanks Again.
Sincerely,
Darizona08