Hannah, Robert; Master Isaac Newton in His Garden at Woolsthorpe, in the Autumn of 1665; The Royal Institution; http://www.artuk.org/artworks/master-isaac-newton-in-his-garden-at-woolsthorpe-in-the-autumn-of-1665-216055
Hannah, Robert, 1812-1909; Master Isaac Newton in His Garden at Woolsthorpe, in the Autumn of 1665