Quotes from Sébastien Le Prestre de Vauban's books, and about them
The Siege of Krishnapur on De l'Attaque et de la Défense des Places: “"...the only sound that came to them was the ghostly echo of a phrase of Vauban he had read: _Place assiégée, place prise!_" -- the Collector's siege manuals are named as "the Collector's authorities, Vauban and so forth".”