D constructed a reservoir on their land. Unknown to D, water from the reservoir filtered through to a disused mine shaft and then spread to a working mine owned by C causing extensive damage. Ds were strictly liable for the damage caused by a non-natural use of land.
'If a person brings, or accumulates, on his land anything which, if it should escape, may cause damage to his neighbour, he does so at his peril. If it does escape, and cause damage, he is responsible, however careful he may have been.'