 In September 1847 Busch began studying mechanical engineering at Hanover Polytechnic . Busch 's biographers are not in agreement as to why his Hanover education ended ; most believe that his father had little appreciation of his son 's artistic inclination . Biographer Eva Weissweiler suspects that Kleine played a major role , and that other possible causes were Busch 's friendship with an <unk> , <unk> , political debates in <unk> 's tavern , and Busch 's reluctance to believe every word of the Bible and catechism . 
