St Dunstan's was the town house in Regent's Park built by the architect Decimus Burton for the 3rd Marquess of Hertford, whose collecting started what became the Wallace Collection. In the First World War it was used as St Dunstan's Hostel for Blinded Military Personnel and Sailors. The present picture shows the instruction of medical trainees in human anatomy. They are being shown the insertion of the head of the femur at the hip joint. The training takes place in one of the temporary canvas buildings erected in wartime on the terrace between the back of the house and the lawn. The house was later demolished. The site is at the time of writing occupied by Winfield House, built for the Woolworth's heiress Barbara Hutton in the 1930s and given by her to the US government to be the US ambassador's residence.