seven o'clock in the evening
`` Are you quite sure of that ? '' `` Certain . '' `` And when does she leave Shanghai ? '' On the 11th , at seven o'clock in the evening . So we have four days , which are ninety-six hours ; and at the rate of eight knots an hour , if the wind hold , we shall be able to reach Shanghai in time . '' `` And when will you be able to start ? '' `` In an hour .