nine o'clock
She guessed that the latter had heard Harriet 's voice and had purposely remained in her room . She had not gone astray in this supposition . Mary _ had _ heard Harriet speak and knew only too well what had brought her to the Deans ' house so early that morning . It was nine o'clock when Marjorie and Harriet left the house to call on Susan Atwell , who lived nearest . Susan read the mysterious warning and was duly impressed with its significance . She was equally at sea as to the writer . It soon developed , however , that Harriet had been correct in assuming that Susan 's wrath at the first game played against Mignon 's team had been occasioned by their unfair tactics .