The glories of Inkermann and Balaclava, of Albuera and Waterloo, paled before the achievements of the whole-souled heroism displayed by the British soldiery standing, as it were, with its back to the wall, and fighting, not so much with any hope of victory, for that was soon seen to be a physical impossibility, but with the invincible determination not to permit the invader to advance on London save over the dead bodies of its defenders.

Such a gallant defence had never been made before in the face of such irresistible odds. When the soldiers of the League first set foot on British soil the defending armies of the North and South had, with the greatest exertions, been brought up to a fighting strength of about twelve hundred thousand men. So stubborn had been the heroism with which they had disputed the progress of their enemies that by the time that the guns of the League were planted on the heights that commanded the Metropolis, more than a million and a half of men had gone down under the hail of British bullets and the rush of British bayonets.

Of all the battlefields of this the bloodiest war in the history of human strife, none had been so deeply dyed with blood as had been the fair and fertile English gardens and meadows over which the hosts of the League had fought their way to the confines of London. Only the weight of overwhelming numbers, reinforced by engines of destruction which could strike without the possibility of effective retaliation, had made their progress possible.

Had they met their heroic foes as they had met them in the days of the old warfare, their superiority of numbers would have availed them but little. They would have been hurled back and driven into the sea, and not a man of them all would have left British soil alive had it been but a question of military attack and defence.

But this was not a war of men. It was a war of machines, and those who wielded the most effective machinery for the destruction of life won battle after battle as a matter of course, just as a man armed with a repeating rifle would overcome a better man armed with a bow and arrow.

Natas had formed an entirely accurate estimate of the policy of the leaders of the League when he told Tremayne, in the library at Alanmere, that they would concentrate all their efforts on the reduction of London. The rest of the kingdom had been for the present entirely ignored.

London was the heart of the British Empire and of the English-speaking world, for the matter of that, and therefore it had been determined to strike one deadly blow at the vital centre of the whole huge organism. That paralysed, the rest must fall to pieces of necessity. The fleet was destroyed, and every soldier that Britain could put into the field had been mustered for the defence of London. Therefore the fall of London meant the conquest of Britain.

After the battles of Dover and Harwich the invading forces advanced upon London in the following order: The Army of the South had landed at Deal, Dover, and Folkestone in three divisions, and after a series of terrific conflicts had fought its way viâ Chatham, Maidstone, and Tunbridge to the banks of the Thames, and occupied all the commanding positions from Shooter's Hill to Richmond. These three forces were composed entirely of French and Italian army corps, and numbered from first to last nearly four million men.

On the north the invading force was almost wholly Russian, and was under the command of the Tzar in person, in whom the supreme command of the armies of the League had by common consent been now vested. A constant service of transports, plying day and night between Antwerp and Harwich, had placed at his disposal a force about equal to that of the Army of the South, although he had lost over seven hundred thousand men before he was able to occupy the line of heights from Hornsey to Hampstead, with flanking positions at Brondesbury and Harlesden to the west, and at Tottenham, Stratford, and Barking to the east.

By the 29th of November all the railways were in the hands of the invaders. A chain of war-balloons between Barking and Shooter's Hill closed the Thames. The forts at Tilbury had been destroyed by an aërial bombardment. A flotilla of submarine torpedo-vessels had blown up the defences of the estuary of the Thames and Medway, and led to the fall of Sheerness and Chatham, and had then been docked at Sheerness, there being no further present use for them.