Old friend and frequent contributor Dennis McNelis just sent me this shot of the rear entrance to TDC. The tennis courts are to the right.
I think I used to enter that way to get to my office, but I must have had to walk around the building to the left to get to the main entrance, since the outside door to my office only opened from the inside. I'm still having trouble figuring out exactly which corner of the building this shows. Memories have faded over the past 37 years or so.
Below is a map of the compound. The TDC building was #19 on the map. I believe the main entrance to the building was just above and to the left of the #19. The tennis courts shown to the right in the above photo are at #17 on this map.
If anyone remembers this any better than I do, or if you can identify anything else in the photo, please let me know.