At dusk that day we had, on arrival from King's Cross, left our baggage with the hall porter of the North British Hotel in Edinburgh, had travelled from the Waverley Station to Dalmeny, and descending the hundred or so steps to the comfortable Hawes Inn, at the water's edge, had dined there. Thence we had taken the old ferry-boat over to North Queensferry, on the opposite shore, where, in the rather bare parlour of the little Albert Hotel, directly beneath the giant arms of the Forth Bridge, we were resting and smoking. Outside the November night was dark and squally with drizzling rain; within the warmth was cheerful, the fire throwing a red glow upon the old-fashioned mahogany sideboard with its profuse display of china and the two long tables covered with red cloths. [Illustration: PORTIONS OF MAP OF NEW NAVAL BASE AT ROSYTH DISCOVERED IN POSSESSION OF A SPY. The notes, here translated from German, were written on the British Ordnance Map.] From my boyhood days, I, John James Jacox, barrister-at-law, had always been fond of detective work; therefore I realised that in the present inquiry before us there was wide scope for one's reasoning powers, as well as a great probability of excitement. I was thoroughly wiping my gold pince-nez, utterly failing to discover Ray's reason in travelling to that spot now that it was admitted that the Germans had already outwitted us and secured a copy of at least one of the plans. Suddenly, glancing up at the cheap American clock on the mantelshelf, my friend declared that we ought to be moving and at once struggled into his coat and crushed on his soft felt hat. It then wanted a quarter to ten o'clock. In ascending the short, steep hill in the semi-darkness, we passed the North Queensferry post office, beside which he stopped short to peer down the dark alley which separated it from the Roxburgh Hotel. I noticed that in this alley stood a short, stout telegraph-pole, carrying about sixty or so lines of wire which, coming overhead from the north, converged at that point into a cable, and crossed to the south beneath the mile-broad waters of the Forth. Ray was apparently interested in them, for glancing overhead he saw another set of wires which, carried higher, crossed the street and ran away to the left. This road he followed, I walking at his side. The way we took proved to be a winding one, which, instead of ascending the steep hill with its many quarries, from the summit of which the wonderful bridge runs forth, skirted the estuary westward past a number of small grey cottages, the gardens of some of which appeared to run down to the broad waters whence shone the flashing light of the Beamer and those of Dalmeny, the Bridge, and of South Queensferry. The rain had ceased, and the moon, slowly struggling from behind a big bank of cloud, now produced a most picturesque effect of light and shadow.