She was also the prime initiator of the gardens at Walmer Castle during his tenure as Lord Warden of the Cinque Ports .
When Pitt was out of the office she served as his private secretary .
She was also the prime initiator of the gardens at Walmer Castle during Pitt 's tenure as Lord Warden of the Cinque Ports .
When Pitt was out of the office she served as his private secretary .