If we required further proof of the groundless nature of the alarm that mental activity was destroying the national mind, we should find it in the well-ascertained fact that the proportion of lunatics is greater among females than males. It may also be urged that Quakers, who pride themselves on the sedateness of their conduct, furnish much more than their share; but for this singular result their system of intermarriage is doubtless much to blame. Still the fact remains, that within a period of eight years, extending from 1847 to 1855, an increase of 64 per cent. took place in our pauper lunatic asylums. These figures, however, afford no more proof of the increase of pauper lunatics than the increase of criminal convictions since the introduction of a milder code of laws and the appointment of the new police afford a proof of increased crime. As the commissioners very justly observe, medical practitioners of late years have taken a far more comprehensive as well as scientific view of insanity than formerly; and many forms of the disease now fall under their care that were previously overlooked, when no man was considered mad unless he raved, or was an idiot. But the great cause of the increase of lunatics in our asylums is to be ascribed to the erection of the asylums themselves. With the exception of three or four Welsh counties, and two or three in the north of England, there is not a shire in England which does not possess some palatial building. These establishments, in which restraint, speaking in the ordinary acceptance of the term, is unknown, and in which the inmates are always treated with humanity, have drained the land of a lunatic population which before was scattered among villages or workhouses, amounting, according to the computation of the commissioners, to upwards of 10,500--just as the deep wells of the metropolitan brewers have drained for miles around the shallow wells of the neighbourhood in which they are situated. For the same reason the number of lunatic paupers has declined in registered hospitals since 1847 from 384 to 185, and in "licensed houses" from 3,996 to 2,313. Upon the whole, we may safely predict that, when these disturbing causes have ceased to act, the annual returns of the commissioners will show that, as the treatment of insanity is every day better understood, so the pauper lunatics in our public asylums, instead of increasing in a ratio for beyond that of the general population, show a diminished proportion. Already there are symptoms that the flood is returning to its proper level; for while the lunatics of all classes in the public asylums, licensed houses, and in the Royal Hospital at Haslar, were 20,493 in 1855, they had only advanced in 1856 to 20,764, which is an increase in the twelvemonth of but 271. THE LONDON COMMISSARIAT.