Wolf, R. _Geschichte der Astronomie._ München, 1877. Woodridge, H. E. _The Oxford History of Music._ Vol. 1, _The Polyphonic Period_. Oxford, 1901. VITA The writer of this thesis was born in Prince Edward Island, Canada. He attended Dalhousie College, from which he graduated in 1894 with high honors in the Classics. He entered Harvard University in 1895, and received the degree of A. B. in 1896, and A. M. in 1897. From 1898 to 1908 he was Instructor, Assistant Professor and Professor of Latin at Colorado College, and from 1908 to 1911 Professor of History at the same institution. He spent the years 1908–9 and 1911–12 in the school of Political Science of Columbia University. He has taken courses with Professors Burgess, Dunning, Osgood, Robinson, Shotwell, and Sloane of Columbia. He is thirty-eight years old. End of the Project Gutenberg EBook of An encyclopedist of the dark ages: Isidore of Seville, by Ernest Brehaut