'Correspondence with [Elizabeth A] Betty Wood and Mick Wells.' Also includes correspondence with P Vousden. Chiefly concerning the structure of sodium niobate (Helen Megaw says 'My renewed interest in it stems from recent work in collaboration with Robert C Miller'). File includes typescript of M Wells and H D Megaw, 'The Structures of NaNb03 [sodium niobate] and Na0.975K0.025NbO3'.