6:20
In it all he could see no purpose , except the possible one of trying his physical endurance . He was a strong boy , or he would have been quite exhausted long before he reached `` Env . No. 17 , '' which was the last but three of the packet . This read : Reach home at 6:20 P. M. Before entering house read No. 18 . C. W. , Jr. . Leaning against one of the big white stone pillars of the porch of his home , Cyrus wearily tore open No. 18 -- and the words fairly swam before his eyes . He had to rub them hard to make sure that he was not mistaken .