claim: Practical Magic is solely based on a 1994 novel.
evidence: Clifton Lock is a lock on River Thames in Oxfordshire , England .. River Thames. River Thames. Oxfordshire. Oxfordshire. England. England. It is located south of the village of Clifton Hampden and north of Long Wittenham .. Clifton Hampden. Clifton Hampden. Long Wittenham. Long Wittenham. It is at the start of the Clifton Cut , which bypasses the river to the north of Long Wittenham .. Long Wittenham. Long Wittenham. The lock was completed in 1822 by the Thames Navigation Commissioners .. Thames Navigation Commissioners. Thames Navigation Commissioners. The main weir , which was built thirteen years later than the lock , runs across the old navigation of the river .. A smaller weir runs just above the lock .