In 1884 Pitt-Rivers donated at least 20,000 items from all over the world and all time-periods to the University of Oxford, which founded the Pitt Rivers Museum. But he also had a second museum, established after 1880 in Farnham (Dorset) and a large number of artefacts in his homes at Rushmore and Grosvenor Gardens, London. Until now the full extent of his collections have never been known but we have established that this second collection also numbered more than 20,000 artefacts. It is probable that during his lifetime he owned in excess of 50,000 separate artefacts.