First collected edition illustrated with drawings by Benett including 12 large chromotypography engravings. Hetzel publisher's binding known as "au globe doré", type 1 "au bandeau noir", spine with lighthouse design and second cover type Engel "h", all edges gilt, anthracite endpapers. Catalogue O at rear. Fine first issue, spine very slightly sunned, headcaps somewhat depressed without significance, lower corners bumped, some minor scratches on second cover, scattered foxing. Thomas Roch invents a revolutionary explosive. The United States government prefers to have him committed rather than see him go to another power more inclined to bankrupt itself for this revolutionary explosive. This novel belongs to Jules Verne's dark vein, where he shows his concern about technological progress. Clovis Dardentor is one of the author's rare humorous novels, a vaudeville set in Africa.