[MILITARIA]. [MILITARY ARCHITECTURE]. [ABADIE DE BERNET (Jean Melchior d') (1748-1820). Exercise on fortifications in which details of the layout, relief and construction of fortifications as well as the attack and defense of places are discussed for the instruction of Messieurs les lieutenants en second élèves du corps de génie. In French, manuscript on paper. France, 18th century (ca. 1748). 2 ff, 137 pp, 3 ff. Bound in full tan marbled calf, smooth spine decorated, contemporary binding. Corners dulled, lack of leather on the headpieces, epidermis. Dimensions : 320 x 210 mmManuscript in two parts, written for the students of the school of the corps of engineers of the Royal School of Engineering of Mézières (1748) by D'Abadie, officer of the military engineering, parliamentarian under the French Revolution and Baron of the Empire, who was director of the fortifications . The name "d'Abadie" is found at the end of the manuscript, not necessarily autograph.