Letter from Charles M Willich, University [?] Life Office, 24 Suffolk Street, Pall Mall, to Professor G G [George Gabriel] Stokes, Secretary of the Royal Society, Burlington House Presenting two further numerical approximations on the circle and the square, to be presented before the Society. They follow up on Willich's paper on the quadrature of the circle, which Stokes presented in 1855 [see related record]. 21 April 1862