three o'clock
`` That 's very sweet of you , but wait until you hear what it is I want you to do . This afternoon my class from the settlement is coming here for tea after I have taken them to the Art Museum . There are ten of them ; all girls about your own age . I intended to give them chocolate and cake , as it is so cold to-day , and Annie was going to serve it , but this morning a telegram came saying her sister is very ill , so Annie is leaving on the three o'clock train for Buffalo and that leaves only Lucy . Will you do the waiting and serving for me ? '' `` Why , of course , we 'd love to , '' they all answered together . `` I can make delicious hot chocolate , '' Sally announced , `` so I might stay in the kitchen and help Lucy . ''