As I did not wish to tell anyone of our plans, and since a large staff usually ends by knowing all, we decided to establish ourselves in the prisoners’ concentration camp at Capella where there were a few officers who were used to silence and discretion. We were living in a small isolated house, outside the village, and this house had become the forge where weapons fatal to the enemy were being shaped. Methods of communication must now be studied. Signaling by night with lights had to be eliminated because the zone in which I decided to act was in a small hollow surrounded by hills and so dominated by them that any lights would be readily visible from them. More appropriate seemed the method of communicating by means of sheets placed on the ground according to schedule. Bottecchia told me that near the house in which his aunts live there was a small brook and in this brook the wash-women usually did their laundering. The wash was probably laid on the grass near the brook to dry. I did not see why the Austrians should suspect an innocuous sheet of conveying information to our command. By taking as a point of reference a field which could be easily identified, why would it not be possible to lay the sheets on it in such a manner as to convey a special meaning to our command? Several aeroplanes were then sent to photograph the regions selected by us, and in the enlarged photographs the brook was plainly visible. One could see the house of my soldier’s aunts, the little bridge which passes over the Friga, and a small group of houses near a mill, marked on a map of one to twenty-five thousandth scale. Near this group of houses there was a large patch of ground which was very distinct in the photograph and which was but a slight distance from the river. I believed it would be suitable to indicate on it by means of sheets what we wished to convey to our command. There were but a few things which would have to be communicated. A sheet on the southwestern corner of the field would indicate, “offensive imminent from the side of Montello”; a white sheet on the southeastern corner would signify “calm”; a sheet on the northwestern angle of the field would indicate, “enemy troops are moving towards the plain”; a sheet on the northeastern corner would mean, “enemy troops are moving towards the mountains”; a sheet placed in the center of the field would mean, “German reinforcements are arriving.” Our aeroplanes would come by day and photograph our signals. The only difficulty lay in the possible discovery of our plan by the enemy, and its use by the enemy to cheat our command. We must provide against such a possibility. We therefore decided that the signals be disposed at different hours every day. If the signals were not placed in the established hours, then they were to be disregarded. So, even if the enemy were to discover our system of signals, he could never wrest from us a confession of the hours in which the signals were to have been placed.