possible to abolish boilers altogether and explode the oil in the cylinders of internal combustion engines, every advantage would be multiplied tenfold. On my arrival at the Admiralty we had already built or building 56 destroyers solely dependent on oil and 74 submarines which could only be driven by oil; and a proportion of oil was used to spray the coal furnaces of nearly all ships. We were not, however, dependent upon oil to such an extent as to make its supply a serious naval problem. To build any large additional number of oil-burning ships meant basing our naval supremacy upon oil. But oil was not found in appreciable quantities in our islands. If we required it we must carry it by sea in peace or war from distant countries. We had, on the other hand, the finest supply of the best steam coal in the world, safe in our mines under our own hand. To change the foundation of the Navy from British coal to foreign oil was a formidable decision in itself. If it were taken it must raise a whole series of intricate problems all requiring heavy initial expense. First there must be accumulated in Great Britain an enormous oil reserve large enough to enable us to fight for many months if necessary without bringing in a single cargo of oil. To contain this reserve enormous installations of tanks must be erected near the various naval ports. Would they not be very vulnerable? Could they be protected? Could they be concealed or disguised? The word ‘_camouflage_’ was not then known. Fleets of tankers had to be built to convey the oil from the distant oilfields across the oceans to the British Isles, and others of a different pattern to take it from our naval harbours to the fleets at sea. Owing to the systems of finance by which we had bound ourselves, we were not allowed to borrow even for capital or ‘once for all’ expenditure. Every penny must be won from Parliament year by year, and constituted a definite addition to the inevitably rising and already fiercely challenged Naval Estimates. And beyond these difficulties loomed up the more intangible problems of markets and monopolies. The oil supplies of the world were in the hands of vast oil trusts under foreign control. To commit the Navy irrevocably to oil was indeed ‘to take arms against a sea of troubles.’ Wave after wave, dark with storm, crested with foam, surged towards the harbour in which we still sheltered. Should we drive out into the teeth of the gale, or should we bide contented where we were? Yet beyond the breakers was a great hope. If we overcame the difficulties and surmounted the risks, we should be able to raise the whole power and efficiency of the Navy to a definitely higher level; better ships, better crews, higher economies, more intense forms of war power—in a word, mastery itself was the prize of the venture. A year gained over a rival might make the difference. Forward, then!