The total mileage covered by the machines on divisional and army manoeuvres was 4,545 miles on reconnaissance and 3,310 miles on other flights. Among the many suggestions made by Major Brooke-Popham for improving the efficiency of the corps, some of the most important have been vindicated by the subsequent experience of the war. It is necessary, he says, that the Flying Corps should be taken seriously by commanders and their staffs. The work of the flying officers involves strain and danger; it is not enough that they should be praised for skill and daring; they must feel that their information is wanted, that an accurate report will be used, and that failure to obtain information from the air will be treated as worthy of censure. If a squadron commander finds that no one cares for the information he brings, he will keep his machines on the ground in rough weather. On divisional manoeuvres the Flying Corps were not always made to feel that they were wanted. No great stress, perhaps, should be laid on this complaint; it belongs to the early days of military flying, and its date is past. A new invention is often slow in gaining recognition. When its utility is as great as the utility of flying a little experience soon converts objectors. What was important was that the experience should be gained before the war. Observers in the early months of the war sometimes found it difficult to convince the military command that their reports were true. The value of information, says Major Brooke-Popham, depends also upon the rapidity with which it is handed in to the proper quarters. 'More than once movements of a hostile cavalry brigade were seen within a few miles of our own troops. The information was not of great value to the Commander-in-Chief, but was of great importance to the advanced guard or cavalry commander, yet by the time it had got out to him from headquarters probably two hours or more had elapsed.' This delay was sometimes avoided on manoeuvres by dropping messages from the air, but the whole large question of the relations of the Flying Corps to the various army commands and the organization of the machinery of report was left until the pressure of war compelled an answer. Then, during the first winter of the war, when the growth of the Flying Corps allowed of more complex arrangements, the machinery was decentralized, and subordinate commanders were furnished directly with the information most needed by them.