PH1993:0021
1990
PH1993:0022
1990
PH1978:0229:069
engineering
14 September 1886
engineering
DR1998:0091:001
1974-1979
DR1998:0091:007
1974-1979
DR1998:0091:008
1974-1979
DR1998:0091:009
1974-1979
DR1998:0091:010
1974-1979
DR1984:0958
18th century
DR1984:0959
18th century