His visitor of the night before had brought a mysterious bag (which Sheard first had observed in his hand as they fled from the Museum) into the house with him. It was evidently heavy; but to questions regarding it he had shaken his head, smilingly replying that he would know in good time why it called for such special attention. He remembered, too, that the midnight caller carried it when he departed, for he had rested it upon the gravel path whilst bidding him good-night. Frowning uneasily, he stepped to the bookcase. It was a very deep one, occupying a recess. With nervous haste he removed "Egypt Under the Pharaohs," and his painful suspicion became a certainty. Why, he had asked himself, should he run about London at the behest of Severac Bablon? And here was the answer. Placed between the books and the wall at the back, and seeming to frown upon him through the gap, was the stolen Head of Caesar! Sheard hastily replaced the volume, and with fingers that were none too steady filled and lighted his pipe. His reflections brought him little solace. He was in the toils. The intervening hours with their divers happenings passed all but unnoticed. That day had space for but one event, and its coming overshadowed all others. The hour came, then, all too soon, and punctually at four-thirty Sheard presented himself in Hamilton Place. Sir Leopold Jesson's collection of china and pottery is one of the three finest in Europe, and Sheard, under happier auspices, would have enjoyed examining it. Ralph Crofter, the popular black-and-white artist who accompanied him, was lost in admiration of the pure lines and exquisite colouring of the old Chinese ware in particular. "This piece would be hard to replace, Sir Leopold?" he said, resting his hand upon a magnificent jar of delicate rose tint, that seemed to blush in the soft light. The owner nodded complacently. He was a small man, sparely built, and had contracted, during forty years' labour in the money market, a pronounced stoop. His neat moustache was wonderfully black, blacker than Nature had designed it, and the entire absence of hair upon his high, gleaming crown enabled the craniologist to detect, without difficulty, Sir Leopold's abnormal aptitude for finance. "Two thousand would not buy it, sir!" he answered. Crofton whistled softly and then passed along the room. "This is very beautiful!" he said suddenly, and bent over a small vase with figures in relief. "The design and sculpture are amazingly fine!" "That piece," replied Sir Leopold, clearing his throat, "is almost unique. There is only one other example known--the Hamilton Vase!" "The stolen one?" "Yes. They are of the same period, and both from the Barberini Palace." "Of course you have read the latest particulars of that extraordinary affair? What do you make of it?" Jesson shrugged his shoulders.