Pan-American Exposition Co - Signed by John George Milburn - 1900 dated Autograph Bond - Location of Assassination of President William McKinley

Signed by John George Milburn (December 14, 1851 – August 11, 1930) who was a distinguished attorney based in Buffalo, New York, and New York City. He served as the president of the New York City Bar Association and was a partner at the law firm Carter Ledyard & Milburn. Milburn is particularly recognized for his role as the President of the Pan-American Exposition, which was the 1901 World's Fair held in Buffalo. He arranged a suite in his residence to accommodate President William McKinley, who was attending the Exposition. Following the president's assassination by anarchist Leon Czolgosz on September 6, 1901, he received medical attention at a hospital and was subsequently taken back to Milburn's home, where he succumbed to his injuries eight days later.

The Pan-American Exposition was a World's Fair that took place in Buffalo, New York, from May 1 to November 2, 1901. This event spanned 350 acres (0.55 sq mi) on the western side of what is now Delaware Park, stretching from Delaware Avenue to Elmwood Avenue and extending northward to Great Arrow Avenue. It is particularly remembered for the assassination of President William McKinley, which occurred at the Temple of Music on September 6, 1901. The exposition featured nighttime illumination, and Thomas A. Edison, Inc. captured footage of the fair both during the day and at night. Known as "The Rainbow City," the exposition garnered significant national media attention in the years leading up to, during, and following the event, attracting over 8,000,000 visitors throughout its duration.