fire._]

[Illustration: _Shows machine guns._]

[Illustration: _Here is another of the methods by which I concealed
the plans of the forts I made._

_First of all, I would sketch the plan as shown in the picture above
giving the strength and positions of the various guns as shown below:_

_A. Kaponiers with machine guns._
_B. 15 cm. gun cupola._
_C. 12 cm. guns cupolas._
_D. Q.-F. disappearing guns._
_E. Howitzer cupolas._
_F. Searchlight._]

[Illustration: _Having done this, I would consider the best method of
concealing my plans. In this case I decided to transform the sketch
into that of a stained glass window, and if you will carefully examine
the picture above you will see how successfully this has been done.
Certain of the decorations signify the sizes and positions of the guns.
These signs are given below, together with their meaning._]

[Illustration: 1. 15 _cm. gun._

2. _Howitzers._

3. _Q.-F. disappearing guns._