Togo copy In this vintage photo, sled dog team musher Leonhard Seppala poses with Togo. The team delivered diphtheria serum to Nome, Alaska, during a 1925 pandemic. (Courtesy of Poland Spring Preservation Society) In this vintage photo, sled dog team musher Leonhard Seppala poses with Togo. The team delivered diphtheria serum to Nome, Alaska, during a 1925 pandemic. (Courtesy of Poland Spring Preservation Society) Solo dog sled expedition to raise funds to honor hero dog Contributed • February 3, 2021 To help install a monument to a sled dog that helped deliver medication during a 1925 pandemic, a Seppala Siberian dog sled team will depart at noon on Saturday, Feb. 20, from the America’s First Mile monument for a solo expedition of over 200 miles through the north woods of Maine.