Read it through once

Now the house was as dark as the grave, except for a faint flare of gas in the basement, and a light in one upstairs room where the blind had not been lowered. As Archer reached the corner he saw that the carriage standing at the door was Mrs. Manson Mingott's. What an opportunity for Sillerton Jackson, if he should chance to pass! Archer had been greatly moved by old Catherine's account of Madame Olenska's attitude toward Mrs. Beaufort; it made the righteous reprobation of New York seem like a passing by on the other side. But he knew well enough what construction the clubs and drawing-rooms would put on Ellen Olenska's visits to her cousin.