Hartwell Manor, Buckinghamshire, 1851.
© Science Museum / Science & Society Picture Library
Engraving of the Jacobean manor house and estate at Hartwell, now known as Hartwell House. The house included an observatory. Illustration from 'aedes Hartwellianae, or notices of the manor and mansion of Hartwell' by William Henry Smyth (1788-1865), published in London in 1851.