A treatise containing the elementary part of fortification, [electronic resource] : regular and irregular. With remarks on the constructions of the most celebrated authors, particularly of Marshal de Vauban and Baron Coehorn, in which the Perfection and Imperfection of their several Works are considered. For the use of the Royal Academy of Artillery at Woolwich. Illustrated with thirty-four copper plates. The fourth edition. By John Muller, Professor of Artillery and Fortification.