Princess Eugenie made a special nod to Queen Camilla during her latest public appearance. The youngest daughter of Sarah Ferguson read to school children in Sloane Square Thursday at Elephant Family’s Little Egg Hunt. The wildlife conservation charity was established in 2003 by Queen Camilla’s late brother Mark Shand. Shand, who died aged 62, was a keen travel writer and spent much of his time advocating for the long-term welfare of the Asian elephant. The princess called Mark “a dear friend” as she took part in the event as the charity is something close to her family’s heart. Speaking with I…