Does anyone know where the dropbox for history 1aa3 is?

i'm not 100%, but im pretty sure its CNH 619. its definitely near CNH 629, Dr. Horns' Office, I'd go there just to clarify

It's on the 6th floor of CNH, directly in front of the elevators. Remember though, DON'T put it in the dropbox unless it's after 4 pm. Try to give it to him directly first, if he's not there give it to the ladies in the office but ONLY put it in the drop box if the office is closed after 4 pm today. That's what he said in lecture.