Be careful what people claim about times of certain events weeks after an event took place. One thing is for sure, Smith could not have left the dinner party first at 10, or for that matter 9:45 as Daisy Minihan had claimed, and meet Lightoller on the bridge shortly after. By 10, if not a few minutes before, Murdoch had come onto the bridge and the two of them would have remained there for about 10 minute so that Murdoch could get his eyes adjusted to the dark. Also, ask yourself why Smith would leave the dinner party, say at 8:45, to check with his OOW, and then go back to the party after telling Lightoller that he would be right inside, especially knowing that they were approaching ice with possible advection fog ahead?