midnight
asked Ann , who had heard it discussed at school all week by the older girls and boys of the neighbourhood , until her head was full of the charms and mysteries of Hallowe'en . `` Why , of course not , '' was the answer . `` Jennie Grayson is fully eighteen years old and would n't want you children tagging around . '' `` But we ca n't work any charms in the afternoon , '' said Ann , `` They wo n't come true unless you wait till midnight to do 'em . I found a long list of 'em in an old book at home and gave them to Jennie . I think she might have asked me . I 'd love to try my fate walking down cellar backwards with a looking-glass in one hand and a candle in the other .