I read the document as follows:

                      Post Office Department
                           Henry C. Payne
         Postmaster General of the United States of America
         To all to whom these Presents shall come, Greeting:

Whereas, on the 2nd day of August, 1904, James K. Mixson was appointed
Postmaster at Flemington,in the county of Marion, State of Florida,
and whereas he did on the 9th day of August, 1904, execute a Bond and 
has taken the Oath of Office as required by law:
Now know ye, That confiding in the integrity, ability and punctuality 
of said James K. Mixson I do commission him a Postmaster, authorized 
to execute the duties of that Office at Flemington aforesaid, according 
to the laws of the United States and the Regulations of the Post Office 
Department. To hold the said office of Postmaster, with all the powers, 
privileges, and emoluments to the same belonging during the pleasure of 
the Postmaster General of the United States.

          In testimony whereof I have hereunto set my hand and caused 
          the seal of the Post Office Department to be affixed,at
   Seal   Washington City, this eighteenth day of August in the year 
          of our Lord one thousand ninehundred and four, and of the 
          Independence of the United States the one hundred and twenty ninth.
                                                          HC Payne
                                                          Postmaster General