Answer:
The quote is "That they are all melancholy old creatures, who had been unfortunate in life"
Step-by-step explanation:
In "Dr. Heidegger's Experiment" by Nathanel Hawthorne, The narrator's tone in the quote above is condescending and pessimistic. the narrator talks about the misfortunes of the four characters; Mr. Melboune, Mr. Gasoigne, Colonel Killigrew and the widow Wycherly. The narrator describes them as miserable and shows that it will be better if they were dead.
In the first paragraph, the narrator looks down on Dr. Heidegger's visitors, his tone was condescending as the narrator describes the four characters. the narrator refers that the four characters are old but have gained no wisdom in their later years.