Extract of a letter from Lord Orrery to Dr Birch Size:L: 75 x 60cm Five figures sketching basic optical

Five figures sketching basic optical details of a conventional and periscopic camera obscura

Segrave was also a successful racing driver

The red and yellow flags of the Spanish are held high while the French tricolour drags on the ground

1st June 1978

Durham Cathedral and the River Wear

Extract of a letter from Lord Orrery to Dr Birch Size:L: 75 x 60cm Five figures sketching basic opticalExtract of a letter from Lord Orrery to Dr Birch, on the character of the English nation, 1746, (1840). Illustration from Historical and Literary Curiosities consisting of Fac similies of Original Documents, by Charles John Smith, (Henry G Bohn, London, 1840).