e. Foyle was still
juggling with his jig-saw puzzle, trying to fit fresh facts in their
proper position to old facts.

"Well?" asked the superintendent abruptly.

Green read from a paper in his hand.

"Taylor, who is watching the Duke of Burghley's House in Berkeley
Square, has just telephoned that a woman who corresponds to the
description of Lola Rachael has just been admitted and is still there."

Into Foyle's alert eyes there shot a gleam of interest.

"You don't say so?" he muttered. And then, more alertly, "Is he still on
the telephone? If so, tell him to detain her should she come out before
I can get down. He must be as courteous as possible. We mustn't lose her
now. And send a man down at once to bring Wills, the butler at Grosvenor
Gardens, here. He's the only man who saw the veiled woman enter the
house on the night of the murder."

CHAPTER XIX

From behind the curtains of the sitting-room Eileen Meredith could see
two men occasionally pass and re-pass the house. They did not go by
often, but she knew that even if she could not see them they always held
the house in view. They were not journalists--they were more sedate,
older men. Nor did they molest any one who entered or left the house.
They merely exercised a quiet, unwearying, unobtrusive surveillance, and
Eileen knew that Heldon Foyle had taken his own way of preventing her
from seeing Sir Ralph Fairfield. She felt certain that were she to leave
the house the men would follow her. She did not guess, however, that
Foyle had intended them to give her an opportunity of discovering their
presence. She would be the more unlikely to persist in her rash resolve
if she knew it would be frustrated. Nor did she know that Fairfield was
equally closely watched in all his comings and goings.

The hysterical outbreak that had been provoked by the superintendent's
penetration of her doings when she had visited his office at Scotland
Yard had been followed by hours of almost complete collapse. To her
father enough had been told to make him hurriedly summon a specialist.
The doctor explained.

"I have known similar cases follow a great shock. She is mentally
unbalanced on one point. Unless anything occurs to excite her in
connection with that, time will effect a cure. She must not be opposed
in her wishes, and I would suggest that she be taken out of London and
an effort made to distract her. Plenty of society, outdoor
amusements--anything to occupy h