Frank and Charles Menches who were food vendors at the 1885 Erie County Fair outside of Buffalo, New York, also known as the Hamburg Fair. Legend has it that during the course of the Fair, the Menches ran out of their signature menu item of pork sausage sandwiches. Their local supplier, Hamburg butcher Andrew Klein, was reluctant to butcher more hogs during a period of unseasonable late summer heat and suggested to substitute the use of ground beef. The brothers fired some up, but both found it dry and bland. They added coffee, brown sugar and other ingredients to create a unique taste. The original sandwiches were sold with just ketchup and sliced onions. With new found success with their beef sandwich, they christened it the “hamburger” after the Erie County Fair's home town of Hamburg. "National Birth of the Burger Day" is celebrated on September 18 to honor the invention of the burger in 1885 at the Hamburg Fair. In the 1920s, carnival historian John C. Kunzog interviewed Frank Menches about his experience at the Erie County Fair. His detailed hamburger story was published in this book, “Tanbark & Tinsel” published in 1970. One of the possible fathers of the hamburger is Charlie Nagreen (1871–1951) of Seymour, Wisconsin, who at the age of 15 sold Hamburg steaks from a street stall at the annual Outagamie County Fair. Nagreen said he began by selling Hamburg steaks, but these did not have much success because people wanted to freely move around the festival without the need to eat them at his stand. In response to this, in 1885 Nagreen decided to flatten the hamburger steak and insert it between two slices of bread, so that the public could move freely from booth to booth while eating his sandwich, an innovation that was well received by his customers. This became known as the "Hamburger Charlie", and Nagreen's creation was sold at the festival until his death in 1951. To this day, his accomplishment is celebrated annually with a "Burger Fest" in his honor in his hometown of Seymour. Another alleged inventor of the hamburger is the cook Fletcher Davis (better known as "Old Dave"), who claimed to have had the idea of putting ground beef between two pieces of Texas Toast when one of his customers was in too much of a hurry to sit down for a meal. The customer walked