Blank greetings card with envelope featuring:

John Wallis NPG D38504

© National Portrait Gallery, London

by Robert Cooper, published by Henry Colburn, after William Derby, after Sir Godfrey Kneller, Bt

John Wallis was a mathematician who played a part in the development of modern calculus and is credited with introducing the symbol for infinity. Having discovered a facility for code breaking, Wallis became a cryptographer on behalf of the Parliamentary party during the Civil War. He was a founding member of the Royal Society, and contributed more than sixty papers and several reviews of mathematical books to the society's Philosophical Transactions. In 1649, Wallis was appointed Savilian Professor of Geometry at Oxford. He held his... more

Card size: 125mm x 175mm

Images are printed in their original proportions, within a white border.