It is a very simple matter for those who have never turned their attention to the state of Great Britain, as one great military and naval power surrounded by others, to treat with entire contempt the idea of any possibility of invasion. We have no doubt that a large proportion of the British nation consider themselves at this moment invincible. It is quite natural that this should be the case. We have accustomed ourselves, in consequence of the result of the last war, to look upon British prowess as something absolutely indomitable. The issue of Waterloo has wiped away all memory of the disastrous retreat to Corunna. We remember Trafalgar with pride, and forget that even in naval matters we found our match in the American. The flag of England has not always been supreme on the seas, or even in her own estuaries. Little more than a century and a half has elapsed since a Dutch fleet entered the Thames without resistance, burned the shipping in the Medway, and held Chatham at its mercy. But the present generation knows little about those things, and is disposed to limit its recollections to comparatively recent events. Nor are even these viewed fairly and fully. We are content to take the catastrophe as the measure of the whole. We overlook the disasters, loss, misery, and bloodshed, which our former state of bad preparation entailed upon the nation, and we will not listen to the testimony of the great living witness--still happily spared to us--when he raises his voice to warn us against wilfully incurring a repetition of the same, or the infliction of worse calamities. Not even by tradition do our common people know anything of the horrors of foreign and invasive war. Of all the European nations we are incomparably the least warlike in our ideas and our habits. Our population knows nothing of military training, is wholly unaccustomed to the use of arms. A few muskets in the hands of a few old pensioners have been found sufficient to overawe and disperse the most infuriated mob. And yet we are told to consider ourselves, and do in part believe it, as capable of resisting any attempt at organised military invasion, at a moment's notice, notwithstanding the enormous numerical inferiority of the whole disciplined troops which we could summon from all parts of the kingdom, to even a fractional part of the force which could easily be brought against us!