Each Sub-Lieutenant will write at the head of his Memoir the text of the particular programme, to which he is obliged to conform in the preparation of his project, and he should add to the text of the Memoir all the sketches properly figured, which are necessary for the proper appreciation of the dispositions which are not sufficiently detailed on the Drawings. The Memoir is divided into three parts, corresponding to the three Plates of Drawings. FIRST PART.--CONSIDERATIONS RESPECTING THE WHOLE PROJECT. 1st. General principles, according to which it would be proper to trace the works indicated in the particular programme, such as lines at intervals, continuous lines, têtes de pont, &c. 2d. Description of the tracing in Plate 1. Reasons deduced from the form of the ground or the nature of the military operations that led to the adoption of the trace. Object of the works, and their connection with each other. 3d. Number, description, and position of the pieces of artillery composing the armament. 4th. Maximum and minimum of troops that could be employed in the defense of these works. 5th. Dispositions which should be adopted (relatively to the necessary preparations in materials and to the separation and movement of troops) for the attack and for the defense. SECOND PART.--COMPLETE ORGANIZATION OF A WORK. 1st. Particular object of the work shown in Plate 2. Trace of the complete projections of the parapets, barbettes, ramps, embrasures, traverses, &c. 2d. Conditions that should be fulfilled by the ditch. Approximate calculation of dimensions which should be given to it, taking into account the increased means of providing for an excess or defect of the deblais. 3d. Discussion on the site and the part which might be expected from small entrenchments, accessory defenses, shutters, descents of ditches, &c. 4th. Site of powder magazines; capacity that should be given to them, suitable to the state of the munitions necessary for the armament of the work. THIRD PART.--DETAILS OF CONSTRUCTIONS. 1st. Means of ascertaining the nature of the earth; considerations respecting relays for the transport of earth with the shovel. 2d. Description, number and disposition of the workmen in a shed for deblai and remblai, according to the nature of the ground and number of relays. 3d. Explanation of Plate 3. Organization of the sheds and conduct of the work where the duration and solidity of the work are the greatest essentials; where, on the other hand, rapidity of execution is the principal thing to be fulfilled. 4th. Which of the modes of construction exhibited in Plate 3 it would be desirable to employ for the proposed works, according to the circumstance specified in the particular programme. Calculation for this mode of construction, of the time and of the numbers of men and tools necessary for the execution of the deblais and remblais of the work given in the plate.