How to find David Elmore's office

My office is in PRIME Lab, the underground accelerator facility next to the physics building. Proceed to the stairwell in the corner of the physics building that is closest to the fountain on the mall. At the ground level of the stairway there is a wooden door marked room 8A with an orange PRIME Lab sign on the door. Open the door and walk down a few steps. There you will find a locked door and a house phone. Dial 101 to call my office. If there is no answer, try dialing 100, 106, or 111 and ask to be let in to see me. After we hang up, I will unlock the door. When you hear a buzz, pull the door open (don't push on the latch). Follow the yellow line down a few sets of stairs. My office (S153A) is on the left as you enter the large reception room (S153).