'The importance of this subject with regard to aero-locomotion can hardly be overrated; for these currents, when clearly ascertained and correctly mapped out, would constitute so many great natural routes, where the aeronaut would be borne onward in the required direction with immense velocity, and without danger of encountering squalls or counter-currents. 'But here, fearful of exhausting the patience of our readers, we bring our somewhat lengthened disquisitions to a close, and take our leave for the present of the tempting, though debatable ground of the CUBIC HIGHWAY.' A MEMOIR FOR THE MILLION. On the meeting-line between a moorland and lowland district of Perthshire, stands an old baronial seat, dignified with the name of castle, to which, no doubt, it was entitled long after the date of its erection, in the fifteenth century, although no longer boasting of either the strength or magnificence which such a name implies. Its position, however, is picturesque--standing on the bank of a romantic and finely-wooded Highland glen, and commanding a view on one side of a mountain-range, and on the other of a cultivated country, with its towns and villages in the distance. The mansion is flanked on one side by a court-yard and 'louping-on-stane;' and on the other, by a velvety bowling-green, stretching along to an antique garden of cut yews and hollies overhanging the glen. It boasts, of course, its haunted chamber, and traditional stories of love and murder; but we have not now to do with life or death above stairs, though many a tale might be founded on truths 'stranger than fiction.' Our present purpose is with the neighbourhood of the kitchen. There, too, we find some relics of olden times; a fireplace which would legalise the Scottish invitation, to 'come in to the fire,' inasmuch as within the chimney-arch was the seat of honour and comfort, where a dozen cronies could sit beside the embers, while an ox might roast in front. From that cozy neuk did the old fiddler play in the evening, when the spinning-wheels were put away, and the maids, generally tenants' daughters, had their dance with the stragglers from the stables and cottages. Near the kitchen was a much colder and more dismal place, that went by the name of 'the Pit'--a half-subterranean recess, several steps lower than the kitchen, into which scarcely a ray of light penetrated through the small 'bole' that was drilled in the massive walls for a window. The cheerless aspect of the place seemed to confirm the tradition, that it had sometimes served of yore as a place of involuntary restraint. Its present occupant, however, the son of a day-labourer, found no fault with the accommodation it afforded him. He was a young boy, who cleaned shoes, scoured knives, and received with great deference the commands of Daniel Don, the butler. This boy was called John Dickson. The Pit was his domicile, as well as his work-room, and he made it