nearly three o'clock in
the morning
They wondered what wrong their enemy might feel had been done him to make him thus vengeful . The girls did quite believe that the man of the green goggles , Miss Elting 's caller , was either directly or indirectly concerned in the various mysteries , but that was as far as they could go toward a solution . One by one the campers rolled up in their blankets and went to sleep . Janus held his position in front of the `` Shelter '' throughout the night , but nothing occurred to disturb the camp until nearly three o'clock in the morning . Then two quick shots , fired seemingly right over their heads , brought the Meadow-Brook Girls out of their sound sleep , uttering little exclamations of alarm . Harriet sprang out through the open door without an instant 's hesitation . `` Where is he ?