Steaming in formation at night without lights adds to our 'grey heires.' The menace of collision is ever present. Frequently, in the darkness, we have no guide-ship in plain sight to regulate our progress. The adjustments of speed, that in the daytime kept us moderately well in station, cannot be made. It is best to turn steadily to the average revolutions of a former period, and keep a good look-out for the broken water of a sister ship. On occasion there is the exciting medley of encountering a convoy bound the opposite way. In the confusion of wide dispersal and independent alterations of course to avert collision, there is latitude for the most extraordinary situations. An incident in the Mediterranean deserves imperishable record: "We left Malta, going east, and that night it was inky dark and we ran clean through a west-bound convoy. How there wasn't an accident, God only knows. We had to go full astern to clear one ship. She afterwards sidled up alongside of us and steamed east for an hour and a half. Then she hailed us through a megaphone: 'Steamer ahoy! Hallo! Where are you bound to?' 'Salonika,' we said. 'God Almighty,' he says. 'I'm bound to Gibraltar. Where the hell's _my_ convoy?'" [Illustration: THE THAMES ESTUARY IN WAR-TIME] XVII OUTWARD BOUND CUSTOMS clerks--may their name be blessed--are worth much more than their mere weight in gold. We do not mean the civil servants at the Custom House, who listen somewhat boredly to our solemn Oath and Compearance. Doubtless they, too, are of value, but our concern is with the owner's shipping clerk who attends our hesitating footsteps in the walk of ships' business when we come on shore. He greets us on arrival from overseas, bearing our precious letters and the news of the firm: he has the devious paths of our entry-day's course mapped out, down to the train we may catch for home. As an oracle of the port, there is nothing he does not know: the trains, the week's bill at the 'Olympeambra,' the quickest and cheapest way to send packages to Backanford, suitable lodging in an outport, the standing of the ship laundries, the merits of the hotels--he has information about them all. During our stay in port he attends to our legal business. He speeds us off to the sea again, with all our many folios in order.