| Description | Incoming and outgoing letters exchanged between Edward Neville da Costa and Kathleen Yardley Lonsdale. Includes one exchange of letters between Andrade and William Thomas Gordon in relation to Lonsdale's search for a specific diamond, whereby Andrade followed up with the orignal owner of the diamond to ascertain whether it has in fact been returned to him. The inclusion of these letters follows the original arrangement by Andrade. |