The letter Anthony received... just look in desc.
Here is the letter that Anthony Philips received from Black Mesa, after requesting a job at Black Mesa. It comes with the two page letter, and a signed photo of him, for documentations.
The letter speaks about his over-the-phone conversation with a Black Mesa employee, and the people he will be paired with, during his time at Black Mesa.
This ties in with the story, and his first day at Black Mesa. These files will be seen on the desk of Anthony's office.