Ten o'clock sharp
It was late when they reached the hotel at last , and the girls began to realize for the first time that they were tired . `` See you to-night , '' whispered Walter to Nan , as Grace , Bess and Rhoda disappeared into the lobby . `` And do n't forget that tennis engagement for to-morrow . Ten o'clock sharp . '' Nan played tennis with Walter the next day , and what is more , she beat him , four out of six . She declared later that it must have been either pure luck , or the fact that Walter was so dazed with surprise at finding that it was possible for a girl to beat him that he had given her two sets before he had recovered from the shock . Be that as it may , the fact remained that Nan had to work her hardest to wrest a set from him after that , and felt very lucky if she managed to win one out of three .