secretly warn the Bank of England about the bank-notes. But I had no expectation that Chang Li would try to negotiate those—all his energies, I knew, would be concentrated on the diamond. Nevertheless, he might try—and would, if he tried—succeed—in changing one note, and it was as well to take that precaution.
"Now then, next day, Purvis and I being, in our different ways, at work in the East End, we heard the news about the Praed Street tradesman, Parslett. That seemed to me remarkable proof of my theory. As the successive editions of the newspapers came out during that day, and next day, we learnt all about the Parslett affair. I saw through it at once. Parslett, being next-door neighbour to Daniel Multenius, had probably seen Chen Li—whom we now believed to have been the actual thief—slip away from Multenius's door, and, when the news of Daniels death came out, had put two and two together, and, knowing where the Chinamen lived, had gone to the house in Maida Yale to blackmail them. I guessed what had happened then—Parslett, to quieten him for the moment, had been put off with fifty pounds in gold, and promised more—and he had also been skilfully poisoned in such a fashion that he would get safely away from the premises but die before he got home. And when he was safe away, Chang Li had murdered Chen Li, and made off. So—as I still think—all our theories were correct, and the only thing to do was to find Chang."
But here Levendale paused, glanced at Stephen Purvis, and spread out his hands with a gesture which indicated failure and disappointment. His glance moved from Stephen Purvis to the police officials.
