"The boat is evidently intended to operate a good deal in an 'awash' position, for there is fairly thick armour-plating over the greater part of the upper side of the bow, while the fore end of the superstructure is made of two 6-inch Krupp steel plates meeting at an acute angle, and so forming a kind of stem when the boat is moving in this way. The space enclosed between these two plates is evidently intended to be used as the conning-tower. Here there are a periscope, steering-wheel, voice-tubes, and everything necessary for the control of the vessel. There are two horizontal propellers or fans, which seem to be driven by electricity derived from an installation of accumulators, and which are certainly intended to secure horizontal immersion, so the vessel will not plunge or dive, but immerse herself horizontally by means of these propellers, which, by the way, work in vertical shafts running completely through the boat, one forward and the other aft, as was the case in the _Nordenfeldt_, _Waddington_, and other early submarines. "Forward there is an air-lock and diving-chamber, as in the 'Lake' boats, so that divers can get in and out of the vessel whilst under water. It would also afford a means of escape for the crew in the case of accident. This is further provided for by a detachable boat or caisson at the after end of the superstructure capable of holding ten men, I should say, or possibly a dozen. There are also appliances which I suppose are telephone buoys for communicating with the surface. There are six torpedo tubes fitted, one forward, one aft, and the others two on either broadside. And there seems to be provision for six other torpedoes of the 18-inch type. "There is a long rudder for ordinary steering, and four horizontal ones or planes which are placed abreast the horizontal screws and which, I imagine, act automatically in conjunction with them, as they seem to gear up with the shafts for these propellers. There is a big safety detachable weight which fits loosely into a recess amidships, and four broad wheels with ball bearings which do not fold up as in the 'Lake' boats, but always protrude nearly half their diameter. After all they would not obstruct her way when water-borne more than a keel--or very little more. They are quite independent and unconnected with the interior of the vessel, which while resting on them would receive forward impetus from her propellers. In the 'awash' position she would offer a very small and almost invulnerable target." "Well," I said, marvelling at what we had translated. "What induced you to believe that the cryptogram had any reference to the new submarine."