II
THE ARROW OF HEAVEN
It is to be feared that about a hundred detective stories have begun with the discovery that an American millionaire has been murdered; an event which is, for some reason, treated as a sort of calamity. This story, I am happy to say, has to begin with a murdered millionaire; in one sense, indeed, it has to begin with three murdered millionaires, which some may regard as an embarras de richesse. But it was chiefly this coincidence or continuity of criminal policy that took the whole affair out of the ordinary run of criminal cases and made it the extraordinary problem that it was.
It was very generally said that they had all fallen victims to some vendetta or curse attaching to the possession of a relic of great value both intrinsically and historically; a sort of chalice inlaid with precious stones and commonly called the Coptic Cup. Its origin was obscure, but its use was conjectured to be religious; and some attributed the fate that followed its possessors to the fanaticism of some Oriental Christian horrified at its passing through such materialistic hands. But the mysterious slayer,
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