Chris McManus uncovers the secrets of a collection of six thousand dusty old postcards which turned up in a forgotten cupboard in the Psychology Department of University College London. 

It started with two medium-sized cardboard boxes.

When Richard Rawles of the Department of Psychology of University College London opened them he found 6000 postcards which from the postmarks dated from August 1953.

They were addressed to the BBC Television Service and the search was on to find out how they came to be there and what information they contained.