INTRODUCTION 
Although much better known &s an instrument designer and as 
& specialist in aerial triangulation, E.H.Thompson (1910-1976) 
made several important contributions to close range photogram- 
metry (Atkinson, 19778). Amonr these may be numbered his involve- 
ment in the rebuilding of the Wren church of St. Mary the Virgin 
Aldermanbury as a memorial to Sir Winston Churchill at Fulton, 
Missouri and, somewhat earlier, of the restoration of the dome 
Cf Castle Howard (Thompson, 1962; also in Atkinson, 1977b), 
Thompson's work at Castle Howard in 1960 and 1961 represented 
the first attempt in the United Kingdom to reconstruct part of 
an important mcnument with the help of photographs which were 
not taken for photogrammetric purposes, It is appropriate to 
recall this highly successful application of analytical close 
range photogrammetry using non-metric photography two decades 
after completion of the reconstructed dome, 
CASTLE HOWARD 
The construction of Castle Howard began in 1701 on the site 
of = medieval village and castle, It is situated 15 miles (24km) 
north eost of York znd was built Tor Charles Howard, Third Farl 
of Cerlisle, by Sir John Vanbrugh (1664-1726), The building is 
remarkable as VYanbrugh's first essay in architecture and 
undoubtedly the success of this venture resulted in his being 
chosen as the architect for Blenheim Palace, Vanbrugh's scheme 
for Cestis Howard wss not earried out in full, but st the time of 
his Gesth in 1726, the centre block end cunola (the first in & 
private house in Britain), the south front snd the esst wing 
were complete (Fig.l). 
Queen Mergareit's School, Scarborough wes evacuated to Castle 
Howard during the Second World War end, on 9th November, 1940, 
fire broke out which destroyed the dome (Fig.2) and with it the 
hall ceiling which was decorated with a painting of Apollo by 
Giovanni Pellegrini (1675-1741). 
There are no reliable drawings of Castle Howard which would 
have assisted the post-war restoration, despite the existence of 
the contemporary Vitruvius Britannicus which states that the 
plates contained therein "nore all drown from the originals of 
the architect Sir John Vanbrugh and by him most carefully 
revised", Mr, George Howard, the present owner, asked Mr,Trenwith 
Wills to prepare nleng inter alias for the reconstruction of the 
Come, This he did on an empiricel basis but, when a model was 
made from these nlsns, it was apparent that dimensions and pers- 
nective were incorrect, A nhotogrammetric solution was then 
sought and this turned out to be extremely effective, However, 
it was attended by a series of fortunate circumstances, 
DIMEMSIONS OF THE DOME 
À set of 140 excellent photographs was token by A,X. Henson 
in 1924 for illustrative purposes in the magazine Country Life, 
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