The strength or energy of brain will, when aided by custom, modify the faculty of controlling the disposition to slumber. Frederick the Great, and our own Hunter, slept only five hours in the twenty-four; while Napoleon seemed to exert a despotic power over sleep and waking, even amid the roaring of artillery. Sir J. Sinclair slept eight hours, and Jeremy Taylor three. As a general precept, however, for the regulation of sleep in energetic constitutions, I might propose the wise distribution which Alfred made of his own time into three equal periods,—one being passed in sleep, diet, and exercise, one in despatch of business, and one in study and devotion. Careful habit will often produce sleep at regular and stated periods, as it will render the sleeper insensible or undisturbed by loud noises; the gunner will fall asleep on the carriage amid the incessant discharge of the cannon; and, if I remember right, the slumbers of the bell-ringer of Notre Dame were not broken by the striking of the quarters and the hour close to his ear. IDA. And at what seasons should we wake and sleep? It seems to me, that the Creator himself has written his precepts in the diurnal changes of this world, that are still so healthfully observed by the peasant, but so strangely perverted by the capricious laws of fashion, and even by the romantic “sons of night, And maids that love the moon;” always excepting Astrophel and Castaly. It moves my wonder that they who have looked upon the beauty of a sunrise from the mountain, or the main, can be caught sleeping, when such a flood of glory, beyond all the glare of peace-rejoicings and birth-lights, bursts upon the world. EV. The wisest have thought with you, Ida, although there was one idle poet, even Thomson, who confessed he had “noe motive for rising early.” It was the custom of Jewel and Burnet to rise at four; and Buffon, we are told, rewarded his valet with a crown, if he succeeded in getting him up before six. It is to slight the creation, not to enjoy the beauties of daylight; and it is the _natural_ time for sleep, when the dews of night are on the earth. The proof of this:—There were two French colonels who were marching their troops, one by day, the other by night; and the loss in men and horses was very far greater among the night marchers. CAST. I believe it was Panza, who “never desired a second sleep, because the first lasted from night till morning,”—that immortal Sancho Panza, whose quaint rhapsody we must all echo so gratefully,—“Blessed is he that first _invented_ sleep.” The eulogies of this blissful state, and the wailings of a sleepless spirit, have ever been a favourite theme of the poet, and our own ancient dramatists,—as Beaumont and Fletcher, in the play of “Valentinian,” and Shakspere, from the lips of Henry IV. in his beautiful invocation, and Young, and many others.