Below this fence, on the east, is a narrow stream, a tributary of the Waverney; on the north and west, the high road, but nearly twenty feet below, the banks being perpendicular.
On the south is the remaining part of the moat—now my kitchen garden; but from there up to the level of the house is nearly twenty feet again, and the barbed wire must also be counted with.
"The entrance, as you know, is by the way of a kind of cutting.
There is a gate at the foot of the steps (they are some of the original steps of the priory, Dr. Petrie), and another gate at the head."
He paused, and smiled around upon us boyishly.
"My secret defenses remain to be mentioned," he resumed; and, opening a cupboard, he pointed to a row of batteries, with a number of electric bells upon the wall behind.
"The more vulnerable spots are connected at night with these bells," he said triumphantly.
"Any attempt to scale the barbed wire or to force either gate would set two or more of these ringing.
A stray cow raised one false alarm," he added, "and a careless rook threw us into a perfect panic on another occasion."
He was so boyish—so nervously brisk and acutely sensitive—that it was difficult to see in him the hero of the Nan-Yang hospital.
I could only suppose that he had treated the Boxers' raid in the same spirit wherein he met would-be trespassers within the precincts of Redmoat.
It had been an escapade, of which he was afterwards ashamed, as, faintly, he was ashamed of his "fortifications."
"But," rapped Smith, "it was not the visit of the burglar which prompted these elaborate precautions."
Mr. Eltham coughed nervously.
"I am aware," he said, "that having invoked official aid, I must be perfectly frank with you, Mr. Smith.
It was the burglar who was responsible for my continuing the wire fence all round the grounds, but the electrical contrivance followed, later, as a result of several disturbed nights.
My servants grew uneasy about someone who came, they said, after dusk.
No one could describe this nocturnal visitor, but certainly we found traces.
I must admit that.
"Then—I received what I may term a warning.
My position is a peculiar one—a peculiar one.
My daughter, too, saw this prowling person, over by the Roman castrum, and described him as a yellow man.
It was the incident in the train following closely upon this other, which led me to speak to the police, little as I desired to—er—court publicity."
Nayland Smith walked to a window, and looked out across the sloping lawn to where the shadows of the shrubbery lay.
A dog was howling dismally somewhere.
"Your defenses are not impregnable, after all, then?" he jerked.
"On our way up this evening Mr. Denby was telling us about the death of his collie a few nights ago."
The clergyman's face clouded.
"That, certainly, was alarming," he confessed.
"I had been in London for a few days, and during my absence Vernon came down, bringing the dog with him.
On the night of his arrival it ran, barking, into the shrubbery yonder, and did not come out.
He went to look for it with a lantern, and found it lying among the bushes, quite dead.
The poor creature had been dreadfully beaten about the head."
"The gates were locked," Denby interrupted, "and no one could have got out of the grounds without a ladder and someone to assist him.
But there was no sign of a living thing about. Edwards and I searched every corner."
"How long has that other dog taken to howling?" inquired Smith.
"Only since Rex's death," said Denby quickly.
"It is my mastiff," explained the clergyman, "and he is confined in the yard. He is never allowed on this side of the house."
Nayland Smith wandered aimlessly about the library.
"I am sorry to have to press you, Mr. Eltham," he said, "but what was the nature of the warning to which you referred, and from whom did it come?"
Mr. Eltham hesitated for a long time.
"I have been so unfortunate," he said at last, "in my previous efforts, that I feel assured of your hostile criticism when I tell you that I am contemplating an immediate return to Ho-Nan!"
Smith jumped round upon him as though moved by a spring.
"Then you are going back to Nan-Yang?" he cried.
"Now I understand!
Why have you not told me before?
That is the key for which I have vainly been seeking.
Your troubles date from the time of your decision to return?"
"Yes, I must admit it," confessed the clergyman diffidently.
"And your warning came from China?"