one o'clock
`` Ten o'clock , '' replied Gideon Spilett . `` And what distance is it to the Cape , captain ? '' `` About fifteen miles , '' replied the engineer . `` That 's a matter of two hours and a half , '' said the sailor , `` and we shall be off the Cape between twelve and one o'clock . Unluckily , the tide will be turning at that moment , and will be ebbing out of the gulf . I am afraid that it will be very difficult to get in , having both wind and tide against us . '' `` And the more so that it is a full moon to-day , '' remarked Herbert , `` and these April tides are very strong . ''