Answer:
The narrator knows Bartleby's secret, but he won't divulge it.
Step-by-step explanation:
Bartleby is a very poor person who is experiencing difficulties in life. he is so poor that he can not afford a home to live in, so he decides to live hidden in an office in downtown Wall Street that is a dangerous place and does not provide what is necessary for a person to live with dignity. As already said, Bartleby is living in hiding in the office. The narrator knows of this secret, but he takes pity on Bartleby's situation and decides not to divulge Bartleby's secret.