About seven o'clock
`` Look out , '' exclaimed the inspector . `` Do n't let her fall . '' Five or six times , throughout the day and evening , Waymark had knocked at Ida 's door . About seven o'clock he had called at the Castis ' , but found neither of them at home . Returning thence to Fulham , he had walked for hours up and down , in vain expectation of Ida 's coming . There was no light at her window . Just before midnight he reached home , having on his way posted a letter with money in it .