six o'clock
`` I will send up to Fraulein and ask her to excuse your lessons this morning . You will be better for a quiet day at home with me . '' Mary was relieved not to go to the White House , for she dreaded more questions from the children , but as to spending a `` quiet '' day at home , that was not possible . It never would be possible any more , she thought , for now she had to consider and contrive how to get her money to the appointed place at six o'clock that evening . She knew the spot well , it was only a little distance beyond the White House . Just where the four roads met there stood a sign-post ; near this was a large old oak-tree , and at its foot a broad flat stone with a hollow under one side . It was there she had to put her money , but how to get it there without observation ?