The Great Portrait Mystery
Fittleworth reflected for a moment in a state bordering on panic.
"I'm afraid," said he, "there's something wrong; but we'd better run round to the Portrait Gallery and verify your statement."
They hurried out together, and turning round into St. Martin's Place, entered the Portrait Gallery, where a very brief investigation proved that Mr. Dudley had been engaged the whole of the previous day.
Fittleworth broke out into a cold sweat. It was evident that a fraud had been committed; and a most elaborate fraud for, among other matters, an attendance card must have been counterfeited. But what could be the object of that fraud? A copy, no matter how good, seemed hardly worth such deliberate and carefully-considered plans. Fittleworth and the painter looked at one another, and with the same horrible suspicion in both their minds they hurried away together to put it to the test.
As Fittleworth entered the small, isolated room where t