Thus pass the days, vibrant with this invisible business. Everyone tells what he knows, listens to what he ought to hear, responds when he is called. From the ocean to the Red Sea, all the wandering ships are held together by these bands, and the magical electric current effaces distance. But there are times when one is silent. When, on the trail of adventure, the bold vessels go up the Adriatic to the threshold of their enemy, their voices are as hidden as their path is dark. However imperious the calls, they do not reply. All about them, at Cattaro, at Lissa, in the islands and arsenals, the telegraphic spies would hear their voices as they approached. Dark and silent, they move without speaking. All chinks are stopped up in the cabin where the men listen. All along the route, in these furtive hours, they catch mysterious conversations. Some Austrian spy in Italy or the Greek Islands has seen in the twilight the departure of the French fleet towards the north. In a chimney, or cellar or well, this spy has concealed a transmitting station of which the neutrals are ignorant; he sends brief messages which sound like a whistle. We do not understand the numbers, but we guess what they mean. “The French are about to leave,” “they are leaving,” “they are in the Adriatic,” “they are approaching Cattaro.” No French mouth is responsible for this hostile voice; we know it by its singing timber like a flute or a mosquito’s buzz. It is the Telefunken apparatus which produces this sound, which one would recognize among a thousand. All night its vibration follows us. Whence come these whispers in the darkness? By what miracle, from moment to moment, do we hear these sonorous flashes which talk about nothing but us? “The French are passing Brindisi;” “they are passing Bari;” “they are turning towards the northeast;” “about two o’clock they will be near Pelagosa.” In the distance vibrate the responses, which become more and more distinct. It is Cattaro, Pola, the Dalmatian Isles, awaiting us. Yes, we move in a circle of sinister spirits, and these Germans have prodigious ears. Their high shrill murmur, undecipherable yet very clear, darts round us as we advance through the darkness. Perhaps destroyers and submarines are lurking on our course. Those that have missed us in our too rapid progress telegraph the next sentinel, and he rushes toward us with his torpedo ready. Where is he? Behind or in front? Gunners, do not sleep at your guns! Officers, bend over the empty blackness! Cruiser, enveloped in shadow, move faster and ever faster! These evil specters of the Adriatic are lying in wait for you; the whistling of their ghostly lips prepares your destruction! But do not be afraid. They will wear themselves out in the pursuit, and to-morrow you will be at the post where France desires you. But what cruiser, which battleship, is destined to receive the fatal wound from these singing demons?