Dear Teacher,

What is the difference of the Secretary of State, in New York and the Secretary of State, in Washington D.C.
I understand that the Minister of Foreign Affairs of some countries is something equivalent to the Secretary of State in USA, so what does this mean, in a Letter of Secretary of State, Alexander F. Treadwell, New York, 26th. Jan. 2000, when the name of such person is not the name of the Secretary of State at that time, and whose Department (Ministry) is not located in Washington DC but in New York?

Best regards,