one o’clock
` Do you suppose anything is wrong ? ' asked Mary nervously . ` Of course not , ' said Edith . ` I remember seeing Lisa in the playground at one o'clock , but my impression is that she was alone , and stayed only a moment . At any rate , I was very busy and did not speak to her . Mrs. Grubb has probably taken the twins to have their hair cut , or something of that sort . ' ` What a ridiculous suggestion ! '