The Plumstead case (Fig. 81), though less extreme, is even more informing, as it seems to measure the rate at which the disappearance goes on; the dates on the three stones coinciding accurately with their comparative depths in the ground. Whether the motion of the earth has any influence in this connection need not now be discussed, because the burying of the gravestones may be accounted for in a simple and feasible manner, without recourse to scientific argument. It is undoubtedly the burrowing of the worms, coupled with the wasting action of rain and frost, which causes the phenomenon. Instead, however, of the sexton's supposititious century, the period required for total disappearance may more accurately be regarded as from 200 to 250 years. It has been found by careful observation in a few random cases that the stones subside at the rate of about one foot in forty or fifty years, and, as their ordinary height is from 5 feet to 5 feet 6 inches, we can readily tell, providing the rate rules evenly, the date when any particular stone may be expected to vanish. In confirmation of this theory is the fact that scarcely any headstones are discoverable of a date earlier than 1650, and whenever they have been left to their fate the veterans of 150 years have scarcely more than their heads above ground. Wherever we find otherwise, it may be assumed that conscientious church officers or pious parishioners have bethought them of the burial-ground, lifted up the old stones and set them once more on their feet. Of recent years there has grown up and been fostered a better feeling for the ancient churchyards, and the ivy-clad churches of Hornsey and Hendon may be cited as examples familiar to Londoners in which the taste engendered by a beautiful edifice has influenced for good its surroundings. In both churchyards are many eighteenth-century stones in excellent preservation. Neither place, however, has yet been "restored" or "reformed" in the modern sense, and there is no reason why it should be. In many places, as the town grows and spreads, it is well to convert the ancient graveyard into a public garden, so that it be decently and reverently done. But this ought never to be undertaken needlessly or heedlessly. There are scruples of individuals to be regarded, and a strong case ought always to exist before putting into effect such a radical change. But it usually happens that transformation is the only remedy, and nothing short of a thorough reaction will rescue God's Acre from the ruin and contempt into which it has fallen. Yet we should ever remember that, whatever we may do to the surface, it is still the place where our dead fathers rest. "Earth to earth and dust to dust, Here lie the evil and the just, Here the youthful and the old, Here the fearful and the bold, Here the matron and the maid, In one silent bed are laid."