seven o'clock
`` Oh , it 's lots of fun , '' Dotty replied ; `` everybody is rigged up in sheets , with a head-thing made of a pillow-case , and a little white mask over your face , so nobody knows you . '' `` Can I go ? '' asked Genie , her black eyes dancing . `` No , '' said her mother , `` you 're too young , dearie , this party of Edith Holmes ' is an evening party ; it begins at seven o'clock and only the big girls can go to it . '' `` Oh , dear , will I ever get grown up ! '' and Genie sighed with envy of her sister and Dolly . `` But how do you know who anybody is ? ''