Recently when I was sorting through old Christmas cards I came across one Eloise sent to Kirsty, which started "Dear Kirkenstein".  I remember discussing this nickname that Eloise often used for Kirsty not long before Eloise died.  Kirsty had always assumed that the nickname came from Frankenstein, and thought it a little mean, but Eloise laughed and said "no silly, it comes from Einstein of course, because you have a brilliant brain like him!".I am glad we had that conversation when we did, because otherwise Kirsty would never have known.