A letter bomb defuzed, 1712

Here are some details of a letter bomb sent to the Earl of Oxford in November 1712.  The device was defuzed by the author of “Gulliver’s Travels”, Jonathan Swift. There was much misreporting of the incident in the newspapers of the time but I have found a reference to what actually happened with some significant detail of the device in a book by Swift which refers to this report as being correct.  In this report, the “gentleman in the room” is Swift.  A bandbox is a box used for storing hats. I believe the “wild-fire” referred to is some sort of flammable oil.

Discovering London’s bomb disposal facility from 1894

I have written before about the early British  EOD facility on Duck Island, a short distance from Downing Street, at the bottom end of St James’s Park, London. There, barely 100m from 10 Downing St is a small Island at the end of the lake, with a link to the road over a bridge.  The facility was established by Colonel Majendie and his assistant Dr DuPre in about 1894.  Col Majendie, had been working for the Home Office as Chief Inspector of Explosives for over 20 years by then having been first appointed in 1871.  During that time he had dealt with a wide variety of IEDs and associated investigations, and developed some C-IED procedures.  But the world was changing.  Following a visit to Paris that I discussed here and here,  he pushed hard for some similar facilities to the four French EOD facilities dotted around Paris at stratgic locations. The context at the time was an upsurge in anarchist bombings around the world. The 1890s were later described as “the decade of the bomb”. Majendie had undertaken overseas liaisons before, includng with the US authorities during the Fenian campaigns of the 1880s (many of the IEDs were made in the US and shipped to the UK, with US based support).  Majendie reviewed the French EOD techniques and liked what he saw.

Majendie recommended three such facilities be established in London, one on Duck Island to be adjacent to the seat of government, one in “The Gravel Pit” in Hyde Park, adjacent to the district of Oxford St and Mayfair, and one in the moat at the Tower of London, covering the banking district of the city.  Duck Island was the first and I believe that the Hyde Park facility may have existed as well, but I can find no evidence or suggestion that the Tower of London site was ever set up.  The facilities were housed in wooden sheds, (like in Paris) I believe with some form of earth mound in the manner of the French facilities. I understand that amongst the equipment  in Duck Island was a hydraulic press and a mercury bath contraption for lowering an IED into a mercury bath, dissolving the solder which held together some spherical-shelled anarchist devices.  Other devices were dealt with at Woolwich Arsenal Laboratories in some circumstances in a proofing lab there, which also had a blast proof cell.

The EOD facility at Duck Island (that’s my description, not Majendie’s) was operational from November 1894 and was still apparently in use in at least 1914 when some suffragette devices were taken there. IEDs were moved to the facility in the hand cart I described here or later in a specialist vehicle provided by the Army. I don’t know when it fell into disuse.  However in the 1980s the derelict wooden shacks were still there, hidden amongst rhododendron bushes and out of site, out of mind.

At this stage, for reasons that are unclear the Army was tasked with removing the facility, and that task fell to the Royal Engineers. A recce of the site was undertaken, and the remnants of the facilty (fundamentally a rotting wooden shed and its contents) was taken to Chatham and subsequently and regrettably lost or scrapped.  However in the last few days I have been given sight of some photos taken by the Royal Engineers on the recce, now held by the RE Museum .  Regrettably the Royal Engineer’s Museum own the photos and have not given me permission to republish them without a not insignificant licence fee. This website simply doesn’t have the budget for the license fee requested, so all I can say is that the photos appear to show what I believe is a hydraulic press, probably installed by Majendie in 1894. The photos are not too clear but the press appears to be somewhat more complex than the French version that I showed an image at the earlier link.  There appear to be a number of levers which may have been able to be adjusted remotely by attaching lines.  My assessment is that both the French and the British presses were used to “crack open” devices semi-remotely.  By this I mean set up with a specific action prepared, then activated from a distance by means of a rope or line on a lever, activating the press.  A typical anarchist device was contained in two halves of a metal sphere, soldered together.  It may be that a variety of other IED containers, such as tins and boxes could have been opened remotely by this method.  The lightweight wooden huts were cheap and easily repairable and the earth mounds would have been designed to stop shrapnel.

Without more detail, which I’m investigating, I cannot tell more, and I hope to persuade the RE Museum archive to allow me to reproduce the photos without the current expense they ask for.

The use of a hydraulic press is interesting. Majendie would have been very familiar with such presses, his role as Inspector of Explosives meant he investigated industrial explosive accidents and he developed much of the legal regulations surrounding explosives manufacture. Presses were used extensively in the explosive industry to press explosives into shape in gunpowder mills. Presses were also used for some explosive testing. As a former Superintendent of the Woolwich explosive laboratory, Majendie would have been familiar with their use.

By their nature presses are pretty resilient pieces of equipment  – take a look at the hydraulic press channel on YouTube for a feel of what they are capable of.

Some key points :

  1. The facility then was a copy of the French facility, to some degree, and the French EOD/C-IED methodology appears to have been utilised (with variantions) by Majendie and Dr DuPre from 1894.
  2. The site was operational for at least 20 years.
  3. The British and French were not the only EOD operators active in the 1890s in C-IED. See details of New York’s Owen Eagen here http://www.standingwellback.com/home/2012/1/14/the-eod-operator-who-dealt-with-more-ieds-than-anyone-else.html
  4. The facility remained derelict until the 1980s or 1990s but was then demolished and scrapped. The organisation sent to deal with it probably had no clue as to its historical importance.

EOD Decision Making

After some recent dialogue with colleagues, but with some caution, I am returning to aspects of EOD Psychology. I have spoken at length to some leading medical doctors on how medical diagnostics are made prior and during complex surgery and I have continued to devour what I think might be relevant literature.

Let me explain my caution first.  When I trained as an EOD operator I received no instruction in dealing with cognitive biases, whether they be my own or others with whom I engaged with. When I commanded an EOD unit I had no real concept or understanding of cognitive biases displayed by my teams. But I think I  could tell a good operator from a bad one, and retrospectively I think it was those who were best able to make decisions under stress who stood out.  Without realising it I think I was identifying those who had techniques for coping with cognitive biases. Poor operators were ones whose cognitive biases overwhelmed them to a point of confusion.

In the (many!) years since I moved on from operational duties I have worked with a significant number of bomb squads and EOD operators around the world. I have also studied, on an amateur level, aspects of psychology that I felt were relevant. I have written some posts about this activity on this website before – you can find them by following the “EOD Psychology” tab on the sidebar to the right.

For what it is worth, I still consider myself very much an amateur in this field. But some of the lessons I have learned apply not only in the EOD world but in broader life, business, especially in complex projects.

One post that got some interesting personal feedback was the identification of techniques that EOD Operators could use to “force” them past cognitive biases. I proposed the use of a what I called a pre-mortem technique to force a more objective analytical approach in certain planned EOD operations. So, under some pressure to come up with more, here’s a second technique which may have some utility.  I’m thick skinned so if you think this is nonsense, let me know. I’m fairly certain that at its worst, it can do no harm…. here goes.

I think that lessons can be learned from most EOD operations, but that most EOD operators are intrinsically poor at learning those lessons, due to cognitive biases. EOD operators (and frankly this applies in many other fields) are humans who need to force themselves to better identify “decision quality” from “outcome quality” and clearly differentiate between the two.

So, to give this context, ask yourself this question – In your last period of operational activity which was the operation where you made the best decision?  Think hard on that now before reading on….

Now… I’m willing to bet that many of you are now thinking about an operation that went well, as a result. But here is your mistake – you are probably thinking about the “outcome” of your decision not the decision itself.  It is really tricky to identify decision quality subjectively. But I genuinely think it is a skill that one can learn and also dare I say comes with age (I’m making a case for grey beards here!).   So here is the technique I propose that will not interrupt operational activity but in after-action thinking might help you train your brain to think more about decision quality :

After every operation have a think and identify the best decision you made on that operation and the worst. Try to do that consistently. It works well for major business projects too, I think. You will probably find it tricky to start with, and only identify trivial decisions, but it will come as you “force” your brain to address its biases. After a while you will start to identify those decisions you make that have a “quality” that is perhaps unrelated to to the outcome quality. You will build a personal awareness about those decisions you find easy and those decisions you find tricky. Self awareness is the key. You might start to see pattern. I hope you will, and you can use your consequent understanding to make more better decisions and less poor decisions, notwithstanding the outcome of the operation. A “good enough” operation is not one where all your decisions will be satisfactory – use the opportunity!  I would even recommend including these questions in post operational reports with a specific box for each. I would recommend instructors on training courses ask these of their students after a training task. I think it will encourage self awareness, encourage a focus on decision making, and might even provide help to others in your unit.

Good luck. Tell me if it is nonsense.  I welcome dialogue either directly at the email address top right or through the on line comment section.

On a different point, I was talking to a well respected neuro-surgeon about decision making and he recommended two books on the subject – I was gratified that the two books he mentioned were ones I have found very helpful in thinking about this subject. So on the basis of his recommendation, not just mine, here they are:

1. Thinking Fast and Slow, By Daniel Kahneman

2. Sources of Power – How people make decisions, by Gary Klein

EOD Equipment 1573 and 1971

I have finally found a picture of a wheeled EOD shield from 1971 – courtesy of RLC Museum. Compare these two largely similar tools, the first from 1573, and the second from 1971 – 402 years apart. I believe the shield was used operationally in Hong Kong in the sixties, and quickly went out of service after limited use in Ulster in the early seventies.


circa 1573

 

EOD-Equipment-1573-and-1971-1971
circa 1971

My earlier post on the subject of historical ROV’s is here.

Techniques of Bomb Disposal 1942

Interesting film from 1942 showing Sapper EOD operations against air dropped munitions that end up buried deep. At the six minute point and 11 minute point you will hear the word “Wedges”. (hohoho!)  Instructional in nature, but you gotta love the brass band accompaniment at the beginning.   Also, if I’m allowed to make a poor joke, I see that the Royal Engineer Officer’s remedy for an unconscious sapper, poisoned by Carbon Monoxide is to turn him on to his front and massage his bottom (24.45).  Good to see that technique existed so long ago…

BFI Film archive – 1942 Bomb Disposal

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