It must be admitted that the objections to such a practice are not retrospective, for if it be a misdemeanour, it is one that is condoned, perhaps hallowed, by time. For as it is impossible to draw a strict line between flowers that were accidentally imported or "escapes" from ancient gardens, and those that were planted deliberately, we wisely ask no questions in the case of old-established plants of foreign origin, but receive them into our flora as aliens that have become naturalized and are honourably classed as "denizens"; when they have once made good their tenure of the soil, it seems to matter little by what means they arrived. Thus, for example, the starry trefoil, which colonized the Shoreham shingles over a century ago, having apparently come as a stowaway on board some foreign ship, was not only tolerated but highly regarded by English botanists, and its recent destruction is felt to be a national loss. Would it have detracted from its value, if, as indeed may have happened, it had been purposely sown on the beach? On the contrary, it seems desirable that it should now be restored in that manner. Such planting, of course, if done at all, should be done circumspectly, and on a fixed principle, not as an amusement for irresponsible persons or children. I know a flower-lover who, in a district where that beautiful St. John's-wort, the tutsan, was dwindling through depredations, or through some unexplained malady, carefully restored the balance in a score or so of suitable spots; and surely such action was much to be commended. But it is not desired that everyone should be planting tutsan everywhere; nor is there any danger of such a fashion arising, for there is much less tendency to plant than to pluck, to create than to destroy; and for that reason it would be folly to reintroduce any rare plant like the lady's slipper, where the collector would quickly reap what the enthusiast had sown. Such was the objection, it seems to me, to a proposal made some years ago by Edward Carpenter and others, that the diminishing numbers of the rarer butterflies should be reinforced by breeding. One would not willingly repeat the comedy of the angling craze, which solemnly stocks rivers with fish in order to pull them out again for pastime.