In Volume IV which gave all military routes for Belgium north and east of the line Brussels, Nivels, Namur, Liége, Vise, I read on page 13 that the reference maps dealing with the section "Brussels-Louvain" were those of the Belgian General Staff of a scale 1/40,000 but that sheets 31 and 31 of the English War Office were also available. Those English sheets were based on a reconnoiter of the entire district made in 1913 by the English. But more significant is it that English officers were referred to the 1/40,000 scale maps of the Belgian staff, which England obviously must at that time have had--as an asset of preparedness. [Illustration: _Photographs obtained by Mr. Fox from the originals in the German War Office._ Cover and page of book taken from the pocket of British aviator brought down by Germans.] In the German General Staff I had a number of these English maps photographed. They were drawn by the British War Office and photo-etched by the Ordnance Survey office at Southampton 1912. As you may see from the accompanying illustration their detail is marvelous. Even orchards, ruins and wind mills are designated. A Staff Officer in possession of one of these books would not have to reconnoiter Belgium. Referring to Volume IV, which devotes a good deal of space to the movement of troops, he would learn that delays in marching might be caused by "a steep ascent for half a mile out of Brussels on the road to Louvain." He would be comforted to know, though, that "there is a good field of fire and fine view from the roadway except between Cortenberg and Louvain where the view is reduced to one half mile. Troops could operate easily anywhere except in the hilly wooded country about Cortenberg to the south." If he wanted an observation post he would learn that at Cortenberg there was a good church steeple. A footnote reassures him that the roadway has been lined with trees which would afford in summer cover from aerial scouts. These books throw an interesting light upon the question of shelled churches. The Allies have accused the Germans and the Germans have accused the Allies of using church steeples for observation posts. Both armies have used them, both have shelled them. I make this statement because I saw the cathedral of Malines gaping with a hole that could only have come from a German gun--so did the lines run--and because at Houtem, I climbed the steeple of the church of the Annunciation of Mary the Virgin to a German post, and I make this statement because on page 176 of Volume III of these English books on Belgium, I read under "observation points" the names of no less than five churches for a single small district. I photographed this page; you may read the church for yourself.