Sketch of the Norse Discovery of America, at the Festival of the Scandinavian Societies, Assembled May 18, 1891, in Boston, on the Occasion of Presenting a Testimonial to Eben Norton Horsford in Recognition of the Finding of the Landfall of Leif Erikson, the Site of His Vinland Home and of the Ancient Norse City of Norumbega, in Massachusetts, in the 43d Degree