half past six
The water had got into the basement at the store , he telephoned , one of the flood-gates in a sewer having leaked , and they were moving some of the departments to an upper floor . I had expected to have him in the house that evening , and now I was left alone again . But , as it happened , I was not alone . Mr. Graves , one of the city detectives , came at half past six , and went carefully over the Ladleys ' room . I showed him the towel and the slipper and the broken knife , and where we had found the knife-blade . He was very non-committal , and left in a half-hour , taking the articles with him in a newspaper . At seven the door-bell rang .