How does Bartleby the scrivener die?

"The narrator visits Bartleby in the Tombs and tries to persuade him that his new situation is not all bad. But Bartleby knows where he is and refuses to speak to the narrator who was his last connection to humanity and hope. He refuses to speak, he refuses to eat, and eventually, he simply curls up and dies. It is ironic that no one notices at first because he has been virtually invisible through his silence - - the only one who knows is the narrator, the man who allowed this to happen in the first place."