What does Jaggers say Miss Havisham never lets anyone see her do?

Miss Havisham never allows anyone to see her eat or drink.

While we were still on our way to those detached apartments across the paved yard at the back, he asked me how often I had seen Miss Havisham eat and drink; offering me a breadth of choice, as usual, between a hundred times and once.

I considered, and said, “Never.”

“And never will, Pip,” he retorted, with a frowning smile. “She has never allowed herself to be seen doing either, since she lived this present life of hers. She wanders about in the night, and then lays hands on such food as she takes.”