‘So here’s how it works. You get to find them. That’s the hard part – which is to say it’s hard finding them without getting a nasty surprise. Then I’ll come along and do the business. Now the first thing is to understand your adversary. The aim of using a hidden bomb is not to inflict casualties and damage. That is merely a means to an end. The main thing is to create an attitude of uncertainty and suspicion in your enemy’s mind. This lowers morale and creates a degree of caution that slows up his movement. Maybe so. But there’s nothing wrong with a bit of uncertainty in here.
‘Please put out of your mind any preconceptions you might have about Russians, because I can tell you that the man or men who made these devices had a keen understanding of the essence of hidden bombing, which is low cunning and variety, not to mention human psychology. While you are in here continual vigilance is essential. It must become second nature. Keen eyesight and a suspicious mind will keep you alive in this room, gentlemen. You must look for signs of unusual activity which will warn you of potential hazards. Spend a good while looking at something before you think to touch it.
‘And the following clues may indicate the presence of a trap: anything valuable or curious that might make a good souvenir; apparently harmless but incongruous objects. On other occasions elsewhere I have found bombs in the most unlikely objects: a flashlight filled with ball bearings and explosive; a water bottle; a table-knife; a clothes peg; underneath the butt of an abandoned rifle; if it can be moved or picked up it can also explode, gentlemen.’
He pointed at one of the icons leaning against the crypt wall. It had a valuable-looking silver frame. On the wall immediately beside the icon was a red chalk mark.
‘Take that icon, for instance,’ he said. ‘That’s just the sort of thing some light-fingered Fritz might steal. But underneath the frame is a piece of paper covering a hole in the floorboards and a release switch connected to five hundred grams of plastic explosive. Enough to take a man’s foot off. Maybe his whole leg. The chandeliers are wired, so don’t touch them either. And in case you were wondering about it, the remains of the filing cabinet that you see at the head of the room ought to be eloquent proof of the risk you’re running.’
He pointed at a blackened wooden filing cabinet that had once contained three drawers and been the height of a small man: the top drawer was hanging at an angle off its rails and the contents looked like the remains of a bonfire; on the wooden floor immediately below was a dark brown stain that might have been blood.
‘Take a long hard look at it. That drawer was hiding just two hundred grams of plastic, but it was enough to take a man’s face off and blind him. From time to time take another look at it and ask yourself – do I want to be right in front of a hidden bomb like that when it goes off?
‘Other things to look out for are nails, electric leads or pieces of wire; loose floor boards, recent brickwork; any attempt at concealment; new paint or marks that don’t seem to fit in with the surroundings; but frankly there is no end to this kind of list, so it’s best to tell you of the three main methods of operating a hidden bomb that you will find in this room. These are the pull method, the pressure method, or the release method. Also be aware that an obvious trap may be used to disguise the presence of another; and always remember this: the more dummies we find the more your vigilance is likely to be reduced. So keep paying attention. Safe procedure is to do everything slowly. If you meet the least bit of resistance stop what you’re doing. Don’t let go but call me and I will take a closer look. With most of these devices there’s a safety pin hole; to neutralize the device I will use a nail or a pin or a piece of strong wire and put it in the safety pin hole, after which the device will be safe to handle.’
The sergeant of engineers rubbed his stubbled face and thought for a moment. The stubble that covered his face wasn’t so very different from his eyebrows or the stubble that covered his head. His head looked like a rock covered with dry moss. His voice was no less rugged and laconic and the accent Low Saxon probably – as if he was about to tell a Little Ernie joke. Around his neck was a small crucifix on a chain, which we soon discovered was the most important part of his disposal kit.
‘What else? Oh yes.’ From a haversack that was slung over his shoulder he handed us each a dental mirror, a penknife, a piece of green chalk and a small flashlight. ‘Your protective equipment. These three things will help to keep you alive, gentlemen. Right then. Let’s get started.’