eight P.M.
`` You are sure he is a foreigner ? '' asked Beryl , who was feverishly revolving the possibility that the sketch belonged to some detective , and was intended for identification of the picture on the glass door at X -- . `` You ca n't be sure of anything that is only lip deep , but that was the account telephoned to us . There is a reward of twenty dollars if the book is delivered by eight P.M. ; after that time , ten dollars , and directions left by which to forward it to London . He said it was worthless to anybody else , but contained a lot of pictures he valued . '' `` I do not want the reward , but before I surrender the portfolio , I must see the owner . '' `` Why ? ''