Transcriber's note: This story was first serialized in the _Boys of New York_ story paper and was later reprinted as Vol. I, No. 502 in _The New York Detective Library_ published July 9, 1892 by Frank Tousey. This e-text is derived from the reprinted edition. Bats in the Wall; OR, The Mystery of Trinity Church-Yard. By P. T. Raymond Author of "The Bicycle Detective; or, Tracking a Crime on the Wheel," etc., etc. CONTENTS CHAPTER I. A REJECTED PROPOSAL. CHAPTER II. DYBALL'S CLUB. CHAPTER III. AN UNHEEDED WARNING--FRANK MANSFIELD FINDS HIMSELF IN A BAD FIX. CHAPTER IV. THE STRANGE DISAPPEARANCE BENEATH THE CHURCH-YARD WALL. CHAPTER V. BATS IN THE WALL. CHAPTER VI. WHAT HAPPENED AT THE CATHERINE MARKET. CHAPTER VII. A STILL GREATER CRIME UNEARTHED. CHAPTER VIII. THE SECRET OF THE IRON DOOR. CHAPTER IX. IN WHICH FRANK MANSFIELD MAKES AN IMPORTANT DISCOVERY. CHAPTER X. IN THE CHAMBER OF DEATH. CHAPTER XI. AN UNEXPECTED ALLY. CHAPTER XII. WHAT WAS SEEN BY THE CHURCH-YARD WALL. CHAPTER XIII. IN CAGNEY'S SANCTUM. CHAPTER XIV. AN INTRUDER IN THE HOME OF THE BATS. CHAPTER XV. CALEB HOOK MAKES HIMSELF AT HOME. CHAPTER XVI. THE THREE OAKS. CHAPTER XVII. AN ADVERTISEMENT. CHAPTER XVIII. THE GHOST OF THREE OAKS APPEARS AGAIN. CHAPTER XIX. MR. CALLISTER'S CLERK. CHAPTER XX. JERRY BUCK PLAYS THE PART OF A DETECTIVE AGAIN. CHAPTER XXI. FRANK VISITS COTTAGE PLACE. CHAPTER XXII. AN UNTIMELY OCCURRENCE--CALEB HOOK DISCOVERED. CHAPTER XXIII. A DETECTIVE IN A BAD FIX. CHAPTER XXIV. TREASURE HUNTING. CHAPTER XXV. THE MYSTERY OF TRINITY CHURCH-YARD EXPLAINED AT LAST. CHAPTER XXVI. ELIJAH CALLISTER ADDS STILL ANOTHER CRIME TO THE LIST. CHAPTER XXVII. THE JONAH. CHAPTER XXVIII. A FRUSTRATED CRIME--THE END. CHAPTER I. A REJECTED PROPOSAL. "No, Frank, most decidedly not. I must say that I am more than surprised that you should have had the audacity to even think for an instant that such a thing could be." "But we love each other most sincerely, Mr. Callister, and you know as well as I do that there was a time when, with your approval, I was allowed to consider Edna as my future wife." "That may be, young man, that may be--I will even go so far as to admit that such was the case. But circumstances alter cases, and I am inclined to think that I could do somewhat better than to bestow the hand of my only daughter upon a bank clerk at a beggarly salary of twelve hundred a year." "I am assistant cashier of Webster National Bank, and my salary is quite enough for a young couple to get along on with economy; besides, I have prospects of promotion----" "Had, you mean. A year ago such was the case, Frank Mansfield. From what I have recently heard of your career, your drinking, gambling and nightly carousals, I am inclined to doubt if your prospects amount to much now."