Hour after hour passed, while the lieutenants in charge of the torpedo boats incessantly swept the horizon with night glasses; and on the bridge of the _Leicestershire_ a small group of officers and signalmen directed their telescopes and glasses out to sea. The great cruiser in the darkness showed not a glimmer of light; gently her engines moved her to and fro upon her beat; she looked through the blackness like a monstrous destroyer herself; and as she went to and fro her guns were always kept trained out seawards, with the watch ready. Towards 2 a.m. the tide began to set strongly into the Forth, and at the same time the weather became misty. Captain Cornwall, noting with uneasiness that the horizon was becoming obscured, and that the field of vision was narrowing, exclaimed to his fellow-watchers on the bridge that it was an ideal night for destroyers--if they should come. Barely had he spoken thus when he was called aft to the wireless telegraphy instruments. Out of the night Hertzian waves were coming in. The mysterious message was not in the British code; it was not in the international code; and it bore no intelligible meaning. It was in no language that could be recognised--was evidently a cipher. For two or three minutes the recorder rattled off dots and dashes, and then the aërial impulse ceased. Immediately, with a noise like the rattle of pistol shots, the _Leicestershire’s_ transmitters began to send the news of this strange signal back to the flagship at the anchorage. The special tuning of the British instruments kept for fleet work would prevent a stranger taking in her news. While the _Leicestershire’s_ wireless instruments were signalling, a steamer was made out approaching Inchkeith. From her build she was a tramp; she carried the usual lights, and seemed to be heading for Queensferry. A flashlight signal was made to her to ask her name and nationality, and to direct her not to approach, as manœuvres were in progress. She made not the faintest response to these signals--a by no means unusual case with British and foreign merchant steamers. In the dim light she looked to be of about 2500 tons displacement as she steered straight for the _Leicestershire_. Captain Cornwall ordered one of the inshore torpedo boats to proceed to her, and examine her, and direct her, if she was not British, to go into Leith, thus taking upon his shoulders the considerable responsibility of interfering with a foreign ship in time of peace. But she paid no attention to the torpedo boat. She was about 3000 yards off the _Leicestershire_ when the order to the boat was given, and she had now approached within 1500 yards. Disquieted by her proceedings, Captain Cornwall ordered one of the 3-pounders to fire a shot across her bow, and then, as this did not stop her, followed it up with two shots from a 3-pounder directed against her hull.