The policeman nodded.

"He came over here by the morning train," he explained.

"Very good. I know Mr. Cromering well. Will you please take this card to the chief constable and say that I should be glad of the favour of a short interview? This is a piece of luck," he added to Sir Henry, as the constable took the card and disappeared into the building. "We shall now be able to find out all we want to know."

The police constable came hastening back, and with a very respectful air informed them that Mr. Cromering would be only too happy to see Mr. Colwyn. He led them forthwith into the building, down a passage, knocked at a door, and without waiting for a response, ushered them into a large room and quietly withdrew.

There were two officials in the room. One, in uniform, a heavily built stout man with sandy hair and a red freckled face, sat at a large roll-top desk writing at the dictation of the other, who wore civilian clothes. The second official was small and elderly, of dry and meagre appearance, with a thin pale face, and sunken blue eyes beneath gold-rimmed spectacles. This gentleman left off dictating as Colwyn and Sir Henry Durwood entered, and advanced to greet the detective with a look which might have been mistaken for gratitude in a less important personage.

Mr. Cromering's gratitude to Colwyn was not due to any assistance he had received from the detective in the elucidation of baffling crime mysteries. It arose from an entirely different cause. Wolfe is supposed to have said that he would sooner have been remembered as the author of Gray's "Elegy in a Country Churchyard" than as the conqueror of Quebec. Mr. Cromering would sooner have been the editor of the English Review than the chief constable of Norfolk. His tastes were bookish; Nature had intended him for the librarian of a circulating library: the safe pilot of middle class ladies through the ocean of new fiction which overwhelms the British Isles twice a year. His particular hobby was paleontology. He was the author of The Jurassic Deposits of Norfolk, with Some Remarks on the Kimeridge Clay—an exhaustive study of the geological formation of the county and the remains of prehistoric reptiles, fishes, mollusca and crustacea which had been discovered therein. This work, which had taken six years to prepare, had almost been lost to the world through the carelessness of the Postal Department, which had allowed the manuscript to go astray while in transit from Norfolk to the London publishers.

The distracted author had stirred up the postal authorities at London and Norwich, and had ultimately received a courteous communication from the Postmaster General to the effect that all efforts to trace the missing packet had failed. A friend of Mr. Cromering's suggested that he should invoke the aid of the famous detective Colwyn, who had a name for solving mysteries which baffled the police. Mr. Cromering took the advice and wrote to Colwyn, offering to mention his name in a preface to The Jurassic Deposits if he succeeded in recovering the missing manuscript. Colwyn, by dint of bringing to bear a little more intelligence and energy than the postal officials had displayed, ran the manuscript to earth in three days, and forwarded it to the owner with a courteous note declining the honour of the offered preface as too great a reward for such a small service.

"Very happy to meet you, Mr. Colwyn," said the chief constable, as he came forward with extended hand. "I've long wanted to thank you personally for your kindness—your great kindness to me last year. Although I feel I can never repay it, I'm glad to have the opportunity of expressing it."

"I'm afraid you are over-estimating a very small service," said Colwyn, with a smile.

"Very small?" The chief constable's emphasis of the words suggested that his pride as an author had been hurt. "If you had not recovered the manuscript, a work of considerable interest to students of British paleontology would have been lost. I must show you a letter I have just received from Sir Thomas Potter, of the British Museum, agreeing with my conclusions about the fossil remains of Ichthyosaurus, Plesiosaurus, and Mosasaurs, discovered last year at Roslyn Hole. It is very gratifying to me; very gratifying. But what can I do for you, Mr. Colwyn?"