搭乘蒸汽船到明尼蘇達聖保羅地區旅遊的廣告單

出處: St. Paul, E.H. Burritt & co. "Rivers and Streams, The Minnesota guide. A handbook of information for the travelers, pleasure seekers and immigrants ..." 1869. Pioneering the Upper Midwest: Books from Michigan, Minnesota, and Wisconsin, ca. 1820-1910, Library of Congress.