fortification in no more than a few hours.
a, Berhard Rathgen, Das Geschütz im Mittelalter (Berlin: VDI, 1928), Tafel 4, Abbildung 12.
Miniature from the manuscript of Walter de Milimete, at Oxford, A.D. 1326.
b, Ibid., Tafel 7, Abbildung 22. Stone throwing bombard, Vienna, made about A.D. 1425.
c, A. Essenwein, Quellen zur Geschichte der Feuerwaffen (Leipzig: F. A. Brockhaus, 1877), vol. 2, pl. A.
XXI-XXII. Brunswick bombard, cast in 1411 and recorded in a copperplate drawing in 1728.
d, Ibid., pl. A.LXXII-LXXIII. Gun cast for Emperor Maximilian between 1500 and 1510, re
produced from Codex icon. 222, Münich Koniglichen Hof- und Staatsbibliothek.