six
o'clock
She was startled by Betsy 's fierce sudden clutch at their little purse and by the quaver in her voice as she answered : `` No , no , Molly . We 've got to save every cent of that . I 've found out it costs thirty cents for us both to go home to Hillsboro on the train . The last one goes at six o'clock . '' `` We have n't got but ten , '' said Molly . Betsy looked at her silently for a moment and then burst out , `` I 'll earn the rest ! I 'll earn it somehow !