Most of the captains of one regiment known to me have been doing good work during the past two years in teaching the principles of the conduct of patrols and covering detachments. Some of them made use of the Stacey Relief Map; others simply built a sand table about ten feet by five. On this the sand was moulded to form hills and valleys. Blue strings were laid down for streams, yellow ones for roads. Miniature bridges were constructed and placed where desired. Small twigs were used to make forests. By means of practical examples worked out on these made or improvised maps the principles were thoroughly taught and more easily than is possible out of doors; when spring came, only a few exercises on the ground were necessary to make these companies proficient. [Sidenote: Entrenching] Another use made of the sand table was in the teaching of entrenching. Bull Durham tobacco sacks were converted into sand bags and the men taught their use in revetting, loop-holing, etc. Similarly on a miniature scale were taught the preparation of headlogs, the making of gabions, facines and hurdle revetment. Brush work thus taught indoors needs only be followed by one outdoor exercise, in which work is done on the scale actually used in the field, in order to render the company proficient. [Sidenote: Gymnasium] Where the post is so fortunate as to be provided with a gymnasium full advantage should be taken during the winter season of the opportunities for physical training which it affords. The physical development of the men is most important. Where no gymnasium is available a well-planned course in callisthenics is the best substitute and should be used. Callisthenics to music or for pure show should be prohibited. [Sidenote: First aid Signalling] The indoor season must be fully utilized to save the full time of the outdoor season for that training which can only be given then. Instruction in such subjects as first aid and signalling naturally is given at this time. A place for gallery practice can always be rigged up. [Sidenote: Estimating distances] The foundation for estimating distances must be laid, and there should be practice in it every week, during the closed season. In this work the whole company should be employed together only for the first one or two exercises when the principles are being explained; after that a platoon or less at a time. Near each barracks there should be two stakes one hundred yards apart and so placed that the men see them every time the company forms. This is their unit of measure and cannot become too familiar to them. The captain or someone designated by him selects a couple of distances to be estimated. Each subdivision of the company then goes out in turn and upon completing the exercise returns and another goes out.