"Whatever he took it for, it was for no ill purpose," said Mrs. Hill. "Perhaps he made an appointment to see Strode there. If so I don't wonder, he went armed, for Strode was quite the kind of man who would murder him."

"In that case Mr. Strode has fallen into his own trap. However, I'll see what I can do."

"Be careful, Allen. Your father's good name must not suffer."

"That is why I am undertaking the investigation," replied the young man, rising. "Well, mother, I am going to see Mrs. Merry and ask where Cain is to be found. The circus may have left Colchester."

"You might take the brown paper that was round the box," suggested Mrs. Hill. "Mrs. Merry may be able to say if the address is in her son's writing."

"I don't think it is--the hand is a most illiterate one. Cain knows how to write better. I have seen his letters to Eva."

"What!" cried Mrs. Hill, scandalised, "does she let a lad in that position write to her?"

"Cain is Eva's foster-brother, mother," said Allen drily, "and she is the only one who can manage him."

"He's a bad lot like his father was before him," muttered Mrs. Hill, and then went to explain to the servants that Mr. Hill would be absent for a few days.

Allen walked to Misery Castle, and arrived there just before midday. For some time he had been strolling on the common wondering how to conduct his campaign. He was new to the detective business and did not very well know how to proceed. At first he had been inclined to seek professional assistance; but on second thoughts he decided to take no one into his confidence for the present. He dreaded what he might learn concerning his father's connection with the crime, as he by no means shared his mother's good opinion of Mr. Hill. Allen and his father had never got on well together, as their natures were diametrically opposed to each other. Allen had the steady good sense of his mother, while the father was airy and light and exasperatingly frivolous. Had not Mrs. Hill thought herself bound, out of gratitude, to live with the man who had done so much for her, and because of her son Allen, she certainly would not have put up with such a trying husband for so many years. Allen was always impatient of his father's ways; and absence only confirmed him in the view he took of his evergreen sire. He could scarcely believe that the man was his father, and always felt relieved when out of his presence. However, he determined to do his best to get to the bottom of the matter. He could not believe that Mr. Hill had fired the fatal shot, but fancied the little man had some knowledge of who had done so. And whether he was an accessory before or after the fact was equally unpleasant.