First edition, one of 50 numbered copies on Lafuma pure white laid paper, the only deluxe copies. Half-shagreen red binding, spine with four raised bands decorated with gilt fleuron, rubbing to spine, marbled paper boards, endpapers and pastedowns, front cover preserved, speckled top edge, contemporary binding. Study by Gaston Bachelard on the work of Jean Cavaillès. Philosopher and epistemologist, Jean Cavaillès was one of the principal military leaders of the internal Resistance. Companion of the Liberation and co-founder of the Libération resistance movement, he distanced himself from it and created, at the instigation of Colonel Passy in April 1942, the espionage and sabotage network Cohors, while continuing to teach at the Sorbonne. Arrested several times, detained in a camp then tortured during his third and fourth detentions, in Paris, he gave up no names. He was shot at Arras on April 4, 1944.