Altai Man in National Costume (Hat: Kuaraan Boruk, Sheepskin Coat: Ton, with a Stepped Cutout) on a Horse, 1911-1913. From a collection of color postcards of the Altay, or Altai, Mountains region of southern Siberia early in the 20th century. In 1907, Borisov began his expedition in the Altay Mountains, which lasted until 1911. He took around 1,500 photographs during this expedition, which, upon his return to Barnaul, he presented to the public through the use of a magic lantern. The photographs depict views of nature in remote corners of the Altay Mountains and the Altay and Kazakh peoples indigenous to this region. Borisov offered the photographs to various European publishers for the production of postcards. Altai State Regional Studies Museum