Colonel Grey had gone through the library window at about twenty minutes past ten.
Hutchings had gone through the library window at half-past ten.
The mysterious woman had gone through the library window at about ten minutes to eleven.
She came out of the library window at about a quarter-past eleven after a violent quarrel with Lord Loudwater.
Colonel Grey came out of the library window at about twenty-five minutes past eleven, after a distressing interview with Lady Loudwater, apparently in a very bad temper.
James Hutchings had come out of the library window at about half-past eleven, also, if William Roper might be believed, furious.
Lady Loudwater had come through the library window at a quarter to twelve, and gone back through it at five minutes to twelve.
Each of the last three had passed within fifteen feet of Lord Loudwater, dead or alive, both on entering and on coming out of the Castle. The mysterious woman had actually been in the smoking-room with him.
If Lady Loudwater's statement that she heard her husband snoring at five minutes to twelve were to be accepted, neither Colonel Grey, Hutchings, nor the mysterious woman could have committed the murder—unless always one of them had returned later and
