three o'clock
Frank glanced at his chart and then at his speedometer . `` About fifteen miles , '' was his reply ; `` and then we 'll be there too soon . '' The lad was right . It was not three o'clock when the hydroplane came to the spot the lads had selected to descend . `` Well , here we are , '' said Frank . `` Guess we may as well go down , then , '' said Jack . `` Some of those fellows are likely to be prowling about and spot us . ''