LONDON (Reuters) - From the outside it's an ordinary, red-brick house in a terraced row, not unlike tens of thousands of others scattered across Britain.

But on the inside, Jean Preston's spartan Oxford home contained works of art of international significance, carefully acquired over a lifetime and haphazardly displayed.< p>

Preston, a thrifty 77-year-old spinster who rode the bus and ate frozen meals, died in 2006. But art experts and auctioneers have now completed the sale of the exceptional works hoarded in her modest home.