Now in the earlier part of the work of the Federal Convention, in dealing with the legislative department, the delegates were on firm ground, because they were dealing with things of which they knew something by experience; but in all this careful separation of the executive power from the legislative they went wide of the mark, because they were following a theory which did not truly describe things as they really existed. And that was because the English Constitution was, and still is, covered up with a thick husk of legal fictions which long ago ceased to have any vitality. Blackstone, the great authority of the eighteenth century, set forth this theory of the division of power between King, Lords, and Commons with clearness and force, and nobody then understood English history minutely or thoroughly enough to see its fallaciousness. Montesquieu also, the ablest and most elegant political writer of the age, with whose works most of the statesmen in the Federal Convention were familiar, gave a similar description of the English Constitution, and generalized from it as the ideal constitution for a free people. But Montesquieu and Blackstone, in their treatment of this point, had their eyes upon the legal fictions, and were blind to the real machinery which was working under them. They gave elegant expression to what the late Mr. Bagehot called the "literary theory" of the English Constitution. But the real thing differed essentially from the "literary theory" even in their day. In our own time the divergence has become so conspicuous that it would not now be possible for well-informed writers to make the mistake of Montesquieu and Blackstone. In our time it has come to be perfectly obvious that so far from the English Constitution separating the executive power from the legislative, this is precisely what it does not do. In Great Britain the supreme power is all lodged in a single body, the House of Commons. The sovereign has come to be purely a legal fiction, and the House of Lords maintains itself only by submitting to the Commons. The House of Commons is absolutely supreme, and, as we shall presently see, it really both appoints and dismisses the executive. The English executive, or chief magistrate, is ordinarily the first lord of the treasury, and is commonly styled the prime minister. He is chairman of the most important committee of the House of Commons, and his cabinet consists of the chairmen of other committees. [Sidenote: What our government would be if it were really like that of Great Britain.]