"Upon my word," said the doctor, getting up and advancing towards the prisoners. "I don't know--" "Don't be a fool, Prudhom; I know them of old. Sit down, man. Constable, I shall commit the prisoners. Where are my papers?" "Oh, doctor, please save us!" cried the old lady again. "We are speaking the truth. Let us wash our faces and take off our cloaks, and you'll see we are. Oh, we'll never do it again!" And before the doctor could reply, or the scandalised constables could prevent it, the two gipsies cast off their outer garments, and presented themselves to the bewildered spectators in the mud-stained jerseys and knickerbockers of the Holmhurst football club! I draw a veil over the explanations, the lectures, and the appeals which followed, as also I forbear to dwell upon the consternation of the man of science, and the cruel disorganisation of all his cherished theories. It is only fair to say that the professor bore no malice, when once he discovered how the matter stood, and used his magisterial influence with the doctor to procure at any rate a mitigated punishment for the culprits. The delinquents were ordered off to the lavatory, and left there with a can of hot water and a cube of soap, to remove the wrinkles and sunburn from their crestfallen countenances. Which done, they humbly presented themselves in the library, where the doctor, looking very stern, stood already accoutred for the journey home. The leave-taking between the two old gentlemen was subdued and solemn, and then in grim silence Dr Prudhom stalked forth into the night, followed at a respectful distance by his trembling disciples. Till that moment the thought of Bilk had never once crossed the minds of the agitated amateur gipsies, but it flashed across them now as the doctor strode straight for the cross roads. What if the miserable Alexander Magnus should have swallowed the absurd bait laid for him, and be in the act of making his fortune on the very spot they were to pass! They held a hurried consultation in whisper on this terrible possibility. "We shall be expelled if it comes out!" groaned Dell. "Yes; we may as well tell him at once," said Morgan. "He may not be there, you know; perhaps we'd better wait and see, in case." So they went on in the doctor's wake, nearer and nearer to the fatal cross roads at every step. Suddenly, as they came within a hundred yards of the signpost, the doctor stood still and uttered an exclamation, the meaning of which they were able to guess only too readily. Straining their eyes in the direction indicated, they could discern a white shadowy form hovering in the road before them. "What's that?" exclaimed the doctor in a whisper. Dell was conscious of a secret nudge as Morgan gasped--"Oh, it looks like a ghost! Oh, doctor!" and the two boys clung wildly to the doctor's arm, trembling and gasping with well-feigned terror.