one o'clock
`` Ugh ! The mixture we 've already eaten is enough to kill us ! I think we ought to start back home now . I 'm sure that I heard the one o'clock train whistle . '' But Kitty protested . They had n't been out half long enough , she said . If the ice on the creek had been free from snow , they would have skated for hours , and she thought as long as that sport had been spoiled , they ought to do something to make up for it .