It was a tiny episode of the long and stern drama of the Napoleonic wars. Great Britain was supreme on the sea, Napoleon on the land, and, in his own words, Napoleon conceived the idea of "conquering the sea by the land." Paul I. of Russia, a semi-lunatic, became Napoleon's ally and tool. Paul was able to put overwhelming pressure on Sweden, Denmark, and Prussia, and these Powers were federated as the "League of Armed Neutrality," with the avowed purpose of challenging the marine supremacy of Great Britain. Paul seized all British ships in Russian ports; Prussia marched troops into Hanover; every port from the North Cape to Gibraltar was shut against the British flag. Britain, stood alone, practically threatened with a naval combination of all the Northern Powers, while behind the combination stood Napoleon, the subtlest brain and most imperious will ever devoted to the service of war. Napoleon's master passion, it should be remembered, was the desire to overthrow Great Britain, and he held in the palm of his hand the whole military strength of the Continent. The fleets of France and Spain were crushed or blockaded: but the three Northern Powers could have put into battle-line a fleet of fifty great ships and twenty-five frigates. With this force they could raise the blockade of the French ports, sweep triumphant through the narrow seas, and land a French army in Kent or in Ulster. Pitt was Prime Minister, and his masterful intellect controlled British policy. He determined that the fleets of Denmark and of Russia should not become a weapon in the hand of Napoleon against England; and a fleet of eighteen ships of the line, with frigates and bomb-vessels, was despatched to reason, from the iron lips of their guns, with the misguided Danish Government. Sir Hyde Parker, a decent, unenterprising veteran, was commander-in-chief by virtue of seniority; but Nelson, with the nominal rank of second in command, was the brain and soul of the expedition. "Almost all the safety and certainly all the honour of England," he said to his chief, "is more entrusted to you than ever yet fell to the lot of a British officer." And all through the story of the expedition it is amusing to notice the fashion in which Nelson's fiery nature strove to kindle poor Sir Hyde Barker's sluggish temper to its own flame.