(1904 and 1908); on his Religion, Vorhauser (Innsbruck, 1860); his Cosmology, Friese (Breslau, 1862); his Botany, Brosig (Gaudenz, 1883); Sprengel (Marburg, 1890, and in Rhein.
Thence with much spirit, and in face of many difficulties, he betook himself, with his colleague Edward Frankland, to the university of Marburg (1848-1851), where, by intense application, he obtained his doctorate in two years.
Vietor, Die northumbrischen Runensteine (Marburg, 1895).
Kolde; Theodor Kolde, Die Augsburgische Konfession (Gotha, 1896), (contains also the Marburg, Schwabach and Torgau Articles, the Confutatio and the Variata of 1540).
Brie (Geschichte and Quellen der mittelenglischen Prosachronik, The Brute of England or The Chronicles of England, Marburg, 1905).