"He will deny that he was at Dukesfield."

"Zirknitz can swear to his presence."

"No doubt, but will Rudolph do so? He is so afraid of the police."

Ellis reflected for a moment. "You are not so candid with me as you might be, Mrs. Moxton," said he, seriously, "therefore you render my task the more difficult. But answer me truly now. Has Zirknitz ever done anything for which he is wanted by the police?"

"Not to my knowledge," replied the widow, frankly, "but he is such a coward, and his life is so open to danger, that the very name of the law terrifies him beyond expression. It is for this reason that I am certain of his innocence, and for the same reason I shielded him by feigning ignorance of the cryptogram. But we can talk of these things later. I am tired now."

In this abrupt way she dismissed Ellis, and he left the house sorely puzzled, his constant state of mind in reference to Mrs. Moxton. If he did marry her he would marry the sphinx. That was clear enough.

Mr. Richard Busham inhabited a dingy set of offices in Esher Lane, adjacent to the Temple. His staff of clerks consisted of two under-fed, overworked creatures, who scribbled in an outer room for dear life at a miserable wage. The inner room, which had two dusty windows looking on to Bosworth Gardens, was occupied by their employer. This apartment was piled all round the walls with black tin boxes with the names of various clients painted on them in white. A brass-wired bookcase contained a few calf-bound volumes of legal lore; there was a large table covered with green baize, two chairs, and--nothing else. A more dreary or barren room can scarcely be conceived, but Mr. Busham being a miser, it suited him well enough. He called himself a lawyer, but he was really a usurer, and gained a handsome income by squeezing extortionate interest out of the needy. If the walls of Busham's private apartment could have spoken they would have protested frequently against the sights they were compelled to witness. The Holy Inquisition tortured people less than did this rat of a lawyer. He ground down his victims to the lowest, he lured them into his spider-web, and rejected them only when he had sucked them dry. His law was a farce, his money-lending a tragedy.

The man himself resembled in looks Fraisier, the rascally lawyer so admirably drawn by Balzac in "Le Cousin Pons." Like Fraisier, Busham was small, sickly-looking and pimpled; his expression was equally as sinister, and his heart as hard--that is if he had a heart, which his clients were inclined to doubt. He scraped and screwed, and swindled, and pinched to collect all the money he could; yet what benefit he thought he would gain from this hoarding it is impossible to say. He never spent it, he lived like a hermit, like a beggar, and gratified his sordid pride with the knowledge that he was becoming a wealthy man. And when he arrived at wealth? What then! Busham never gave this consideration a thought, perhaps because he fancied he would never become as wealthy as he wished to be. Altogether the man was an unwholesome, evil creature, who should, for the good of humanity, have been in gaol. But he was clever enough to keep on the right side of the law he so misinterpreted.

At mid-day Mrs. Moxton and Ellis presented themselves before this engaging being, and looked round the frowsy office with disgust. Another chair had to be brought in from the outer room for the accommodation of the doctor, and when his visitors were seated, Busham welcomed them with a nervous titter, which showed that he was not quite easy in his mind regarding the interview. Indirectly he resented the presence of Ellis.

"Well, Mrs. Moxton," said he in a whistling whisper, his usual voice, "is there a will?"