And now for the plan of your mansion, for the Ground Plan--the main part of the business, that, on the proper proportioning and arranging of which the success of your edificative experiment entirely depends. Here take the old stale maxim into immediate and constant use, "Cut your coat according to your cloth;" and, if you are a man of only L2000 a-year, do not build a house on a plan that will require L10,000 at least of annual income to keep the window-shutters open. Nor, seeing that you are living in the country, attempt to cramp yourself for room, and build a great tall staring house, such as would pass muster in a city, but is exceedingly out of place in a park. As a matter of domestic aesthetics, do not think of giving yourself, and still less any of your guests, the trouble of mounting up more than one set of stairs to go to bed, but keep your reception and principal rooms on the ground floor, and your private rooms, with all the bed-chambers, on the floor above. Since, however, you have determined on going to the expense of a proper roof, do not suppose that we are such bad architectural advisers as to recommend that the roof should be useless. No; here let the female servants and the children of the family, perhaps, too, a stray bachelor friend or two, find their lodging; and above all, if you are a family man, if you have any of those tender yearnings after posterity, which we hope you have, introduce into the roof a feature which we will remind you of by and by, and for which, if we could only persuade people that such a very old and useful idea were a new one, and our own, we would certainly take out a patent.