What shall we say of the poisoning of our wells and water-supplies by too adjacent burial-grounds? Professor Brande has instanced a case of a well near a churchyard, the water of which had derived not only odour, but colour, from the soil, and gave it as his opinion that the water in all superficial springs near burial-grounds is simply filtered through accumulated decomposition. Some wells near a churchyard in Leicester were disused some time ago because of a perceptible taint in the water, and, in Versailles, several wells which were situated below the churchyard of St. Louis stank so much as to require shutting up. During the Peninsular War, our troops suffered greatly from low fevers and dysentery, caused by being obliged to drink the water from wells which were sunk too closely to the interred sick. Troops have often been compelled to change their encampments owing to this kind of water-poisoning. Cases are on record where men have been seriously injured by excavating amidst some water which had drained from graves. In Paris M. Ducamp, not long ago, discovered a spring which was entirely derived from the rain which fell in the cemeteries and from the liquids of decomposition; and the foolish people, discovering that it possessed the peculiar sulphur-like taste which is always concomitant with decaying organic matter, purchased it as a mineral water! Dr. Mapother has visited the churchyards of many Irish towns, and has 'generally found them placed on the highest spot near the most central part, whence of course all percolations descend into the wells.' One churchyard he particularly describes 'as lying so low that the water from the river overflows it in wet weather, and, notwithstanding this circumstance, from 30,000 to 40,000 people are supplied from this river.'[111] [111] The cemeteries at Finchley, according to Mr. Lowe, are drained into an open brook, and the drainage eventually runs into the River Brent. The cemetery at Tooting at the present moment discharges into an open ditch, and this flows into the River Wandle, from which many of the inhabitants in its vicinity are accustomed to draw supplies.