"Why do you ask?" inquired the detective.

For the convenience of my readers I give a diagram of Lord and Lady Wilmersley's apartments.

X. Spot where Lord Wilmersley's body was found.
1. Doors locked and barred.
2. Windows all barred.
3. Window without bars found open.
4. Library table.
5. Lady Wilmersley's portrait.
6. Doors leading to swimming-pool.
7. Doors leading from hall.
8. Divans.

CHAPTER V

THE DETECTIVE DETECTS

"A very pale yellow!" Cyril was dumb-founded.

Every fact, every inference had seemed to prove beyond the shadow of a doubt that his protégée and Lady Wilmersley were one and the same person. Was it possible that she could have worn a wig? No, for he remembered that in lifting her veil, he had inadvertently pulled her hair a little and had admired the way it grew on her temples.

"Why does the colour of her ladyship's hair interest you, my lord?" again inquired the detective.