about five o'clock
`` Then you will not go on with tonight 's tide ? '' Geoffrey asked . `` No ; the river gets narrower every mile , and I do not care to take the risk of navigating it after dark , especially as there is always a great deal of shipping moored above Greenwich . Tide will begin to run up at about five o'clock , and by ten we ought to be safely moored alongside near London Bridge . So we should not gain a great deal by going on this evening instead of tomorrow morning , and I do n't suppose you are in a particular hurry . '' `` Oh , no , '' Lionel said . `` We would much rather go on in the morning , otherwise we should miss everything by the way ; and there is the Queen 's Palace at Greenwich that I want to see above all things . ''