| Description | Letters from Berry to Pearson, consisting of: letter dated 1893 inviting Pearson to a lecture at the Cambridge Ethical Society, with enclosed leaflet; letters dated 1897 to 1899 regarding geometric algebra and a determinant set by Pearson, with Berry's enclosed notes; letters dated 1901 inviting Pearson to examine for the Adam's Prize; and a letter dated 1903, informing Pearson that he has been awarded an Honorary Fellowship. |