sentences:  The new building was completed by 9 December 1886 and the Lord Mayor of London, Sir Reginald Hanson, attended the opening ceremony.Teaching continued under the first principal of the school, Thomas Henry Weist Hill, who eventually had some ninety teaching staff.The new site, designed by the architect Sir Horace Jones, comprised a common room for professors and 45 studios, each surrounded by a one-foot thick layer of concrete to "deaden the sound".