What does this quote from Bartleby mean?

A. “Sometimes from out the folded paper the pale clerk takes a ring- the finger it was meant for, perhaps, molders in the grave; a blank-note sent in swiftest charity – he whom it would relieve, nor eats nor hungers anymore; pardon for those who died despairing; hope for those who died unhoping; good tidings for those who died stifled by unrelieved calamites. On errand s of life, these letters speed to death. Ah, Bartleby! Ah, humanity!”