Austrian born in Prussia ( Poland ) Oakar von Riensenthal was the district forest ranger in Tuchola Forest when he first studied ornithology and began writing and illustrating his many books on the subject. He eventually became Royal Forester for the Department of Agriculture, Forestry and Domains in Charlottenburg. These beautiful dynamic prints are from his first book Die Raubvogel Deutschlands und des angrenzenden Mitteleuropas ( Birds of Prey of Germany and adjoining Central Europe ). It was published by Theodore Fischer in Cassels. They are all in good condition with the usual wear and tear along the edges that comes with age.