six
o'clock
The sky had changed , too . It was not so blue , and there were switchy mares ' tails across it , and the wind was blowing from Wecanicut , instead of toward it . `` We 'd better start back , '' I said . `` I 'm afraid we 'll be late for the next ferry , as it is , and Father and Mother will be home on the six o'clock train . '' `` Whew ! '' said Jerry , `` I 'd forgotten that . It 's latish already , judging by the sun .