twelve o'clock
The grass was dried up , and seemed to be of equal length in every gulley and every hole that we passed over ; neither could we discover any indications that the earth had been moved for many years , but that was not surprising , for the winter rains would have washed away all superfluous soil , even if a man like Swinton , who was cunning and up to all kinds of dodges , had not taken the precaution to remove all traces of his concealed treasure . `` It is no use , '' Mr. Brown said , wiping the perspiration from his face , and seating himself on a small rock , `` for us to dig at random . We should get nothing for our labor . We must wait until to-morrow night , when the moon fulls , and precisely at twelve o'clock a shadow will be cast upon the spot . '' `` If the sky is filled with clouds what are we to do ? '' I asked . That was something that Mr. Brown had not thought of .