In response to Carnacki’s usual card of invitation to dinner I arrived in good time at Cheyne Walk to find Arkright, Taylor and Jessop already there, and a few minutes later we were seated round the dining table.

We dined well as usual, and as nearly always happened at these gatherings Carnacki talked on every subject under the sun but the one on which we had all expectations. It was not until we were all seated comfortably in our respective armchairs that he began.

‘A very simple case,’ he told us, puffing at his pipe. ‘Quite a simple bit of mental analysis. I had been talking one day to Jones of Malbrey and Jones, the editors of the Bibliophile and Book Table, and he mentioned having come across a book called the Dumpley’s Acrostics. Now the only known copy of this book is in the Caylen Museum. This second copy which had been picked up by a Mr. Ludwig appeared to be genuine. Both Malbrey and Jones pronounced it to be so, and that, to anyone knowing their reputation, would pretty well settle it.

‘I heard all about the book from my old friend Van Dyll, the Dutchman who happened to be at the Club for lunch.

‘“What do you know about a book called Dumpley’s Acrostics?’ I asked him.

‘“You might as well ask me what I know of your city of London, my friend,” he replied. “I know all there is to know which is very little. There was but one copy of that extraordinary book printed, and that copy is now in the Caylen Museum.”

‘“Exactly what I had thought,” I told him.

‘“The book was written by John Dumpley,” he continued, “and presented to Queen Elizabeth on her fortieth birthday. She had a passion for word-play of that kind — which is merely literary gymnastics but was raised by Dumpley to an extraordinary height of involved and scandalous punning in which those unsavoury tales of those at Court are told with a wit and pretended innocence that is incredible in its malicious skill.

‘“The type was distributed and the manuscript burnt immediately after printing that one copy which was for the Queen. The book was presented to her by Lord Welbeck who paid John Dumpley twenty English guineas and twelve sheep each year with twelve firkins of Miller Abbott’s ale to hold his tongue. Lord Welbeck wished to be thought the author of the book, and undoubtedly he had supplied Dumpley with the very scandalous and intimate details of famous Court personages about whom the book is written.

‘“He had his own name put in the place of Dumpley’s; for though it was not a matter for much pride for a well born man to write well in those days, still a good wit such as the Acrostics was deemed to be was a thing for high praise at the Court.”

‘“I’d no idea it was as famous as you say,” I told him.

‘“It has a great fame among a few,” replied Van Dyll, “because it is at the same time unique and of a value both historic and intrinsic. There are collectors today who would give their souls if a second copy might be discovered. But that’s impossible.”

‘“The impossible seems to have been achieved,” I said. “A second copy is being offered for sale by a Mr. Ludwig. I have been asked to make a few investigations. Hence my inquiries.”

‘Van Dyll almost exploded.

‘“Impossible! “ he roared. “It’s another fraud!”

‘Then I fired my shell.

‘“Messrs. Malbrey and Jones have pronounced it unmistakably genuine,” I said, “and they are, as you know, above suspicion. Also Mr. Ludwig’s account of how he bought the book at a ‘dump’ sale in the Charing Cross Road seems quite straight and above-board. He got it at Bentloes, and I’ve just been up there. Mr. Bentloes says it is quite possible though not probable. And anyway, he’s mighty sick about it. I don’t wonder, either!”

‘Van Dyll got to his feet.

‘“Come on round to Malbrey and Jones,” he said excitedly, and we went straight off to the offices of the bibliophile where Dyll is well-known.

‘“What’s all this about?” he called out almost before he got into the Editors’ private room. “What’s all this about the Dumpley’s Acrostics, eh? Show it to me. Where is it?”

‘“It’s that newly discovered copy of the Acrostics the Professor is asking for,” I explained to Mr. Malbrey who was at his desk. “He’s somewhat upset at the news I’ve just given him.”

‘Probably to no other men in England, except its lawful owner, would Malbrey have handed the discovered volume on so brief a notice. But Van Dyll is among the great ones when it comes to bibliology, and Malbrey merely wheeled round in his office chair and opened a large safe. From this he took a volume wrapped about with tissue paper, and standing up he handed it ceremoniously to Professor Dyll.

‘Van Dyll literally snatched it from him, tore off the paper and ran to the window to have a better light. There for nearly an hour, while we watched in silence, he examined the book, using a magnifying glass as he studied type, paper, and binding.

‘At last he sat back and brushed his hand across his forehead.

‘“Well?” we all asked.

‘“It appears to be genuine,” he said. “Before pronouncing finally upon it, however, I should like to have the opportunity of comparing it with the authentic copy in the Caylen Museum.”

‘Mr. Malbrey rose from his seat and closed his desk.

‘“I shall be delighted to come with you now, Professor,” he said. “We shall be only too pleased to have your opinion in the next issue of the Bibliophile which we are making a special Dumpley number, for the interest aroused by this find will be enormous among collectors.’

‘When we all arrived at the Museum, Van Dyll sent in his name to the chief librarian and we were all invited into his private room. Here the Professor stated the facts and showed him the book he had brought along with him.

‘The librarian was tremendously interested, and after a brief examination of the copy expressed his opinion that it was apparently genuine, but he would like to compare it with the authentic copy.

‘This he did and the three experts compared the book with the Museum copy for considerably over an hour, during which time I listened keenly and jotted down from time to time in my notebook my own conclusions.

‘The verdict of all three was finally unanimous that the newly found copy of the Acrostics was undoubtedly genuine and printed at the same time and from the same type as the Museum copy.

‘“Gentlemen,” I said, “as I am working in the interests of Messrs. Malbrey and Jones, may I ask two questions? First, I should like to ask the librarian whether the Museum copy has ever been lent out of the Museum.”

‘“Certainly not,” replied the librarian. “Rare editions are never loaned, and are rarely even handled except in the presence of an attendant.”

‘“Thanks,” I said. “That ought to settle things pretty well. The other question I wish to ask is why were you all so convinced before that there was but one copy in existence?”

‘“Because,” said the librarian, “as both Mr. Malbrey and Professor Dyll could tell you, Lord Welbeck states in his private Memoirs that only one copy was printed. He appears to have been determined upon this, apparently to enhance the value of his gift to the Queen. He states clearly that he had the one copy printed, and that the printing was done entirely in his presence at the House of Pennywell, Printers of Lamprey Court. You can see the name at the beginning of the book. He also personally superintended the distribution of the type and burnt the manuscript and even the proof-pulls, as he says. Indeed, so precise and unmistakable are his statements on these points that I should always refuse to consider the authenticity of any ‘found’ copy unless it could stand such a drastic test as this one has been put through. But here is the copy,” he went on, “unmistakably genuine, and we have to take the evidence of our senses rather than the evidence of Lord Welbeck’s statement. The finding of this book is a kind of literary thunderbolt. It will make some commotion in the collecting dove-cotes if I’m not mistaken!”

‘“What should you estimate its possible value at?” I asked him.

‘He shrugged his shoulders.

‘“Impossible to say,” he answered. “If I were a rich man I would gladly give a thousand pounds to possess it. Professor Dyll there, being more fortunately endowed with worldly wealth, would probably outbid me unmercifully! I expect if Messrs. Malbrey and Jones do not buy it soon it will go across to America in the wake of half the tr............