Just re-reading Memoirs of an Infantry Officer at the moment.
At the end of a spot of leave, Sassoon calls in at the Army and Navy Stores for some vital replenishments before returning to the Front (a superb salmon, 2 bottles of old brandy, 2 pairs of wire-cutters with rubber-covered handles and an automatic pistol). However, the man in the Weapon Department failed to persuade him to buy some Mortleman's Patent Sound Absorbers.
Now, I'm only a miserable lurker on this board but I can tell as well as the next man that Mortleman's Patent Sound Absorbers are obviously some piece of fiendish VSF kit which can only be found in the darker recesses of the Army and Navy Weapon Department. I rely on you VSF chaps to tell me what devilishness they were designed to wreak.
Doug