He first told how he had seen Colonel Grey kiss Lady Loudwater in the
afternoon--Mr. Flexen noted that Lord Loudwater had accused her of
kissing Grey--and of their spending most of the afternoon in the pavilion
in the East wood. The time of his watching had already lengthened in
William Roper's memory. There was nothing new in these facts, and Mr.
Flexen saw no reason to suppose that they had any bearing on the crime.
But William Roper went on to say that soon after ten in the evening he
had been on his round in the East wood, when he saw Colonel Grey walking
in the direction of the Castle. His curiosity had been aroused by what he
had seen in the afternoon, and thinking it not unlikely that he was on
his way to another meeting with the Lady Loudwater, and that it was the
duty of a faithful retainer to make sure about it, with a view to
informing his master should his surmise prove correct, he followed him.

The Colonel went straight through the wood into the Castle garden, walked
round the Castle, keeping in its shadow as he went, till he stood under
the window of Lady Loudwater's suite of rooms.

There he appeared to suffer a check. There was a light in the room on the
ground floor under her boudoir. The Colonel had waited quite a while;
then he had walked round the Castle and into it by the library window.

William, greatly surprised by the Colonel's audacity, had taken up his
position in a clump of tall rhododendrons, opposite the library window,
from which he could keep watch on it.

"What time would this be?" said Mr. Flexen.

"It couldn't have been more than twenty minutes past ten, sir," said
William Roper.