CHAP. VII NUMBER FIVE PIPER'S ROW ( Dr. Jervis's Narrative ) .sx FROM my long association with Thorndyke , I was often able to deduce something of his state of mind and his intentions from observation of his actions .sx Particularly interesting was it to me to watch him ( as unobtrusively as possible ) packing his green canvas " research case " in preparation for some investigation , for , by noting carefully the appliances and materials with which he provided himself , I could form a pretty clear idea as to the points that he thought it necessary to elucidate .sx Thus , on the morning on which we were to set forth for our second visit to Stratford , I stood by with an attentive eye on his proceedings as he put into the case the various articles which he thought might be needed .sx I was specially interested on this occasion because , while I viewed the case with the deepest suspicion , I could think of no method of attack on the undoubtedly plausible prima facie appearances .sx Possibly Thorndyke was in the same position ; but one thing became clear to me as I watched him .sx He was taking nothing for granted .sx As I observed him putting into the case the chemically clean bottles with stoppers prepared for sealing , I realised that he was prepared for signs that might call for an analysis .sx The little portable .sx microscope and the box of blank-labelled slides , the insufflator , or powder-spray , the miniature camera and telescopic tripod , the surveyor's tape and small electric lamp , each indicated certain points which were to be subjected to exact tests and measurements , and the rubber gloves and case of post-mortem instruments showed that he contemplated taking an active part in the actual necropsy if the opportunity should present itself .sx The whole outfit suggested his habitual state of mind .sx Nothing was to be taken on trust .sx The one undoubted fact was that Sir Edward Hardcastle was dead .sx Beyond that Thorndyke would accept no suggestion .sx He was going to begin at the beginning as if no cause of death had been hinted at .sx One item of the outfit did certainly puzzle me considerably - a box of keys from Polton's rather doubtfully legal collection .sx The fact is that our worthy laboratory assistant held somewhat obscure views on certain aspects of the law ; but on one subject he was perfectly clear .sx Whatever legal restrictions or obligations might apply to common persons , they had no application to " The Doctor .sx " In his view , his revered employer was above the law .sx Thus , in the assumed interests of that employer , Polton had amassed a collection of keys that would have been enough to bring a " common person " within hail of penal servitude , and a portion of his illegal hoard I now saw going into the research case .sx I examined them with profoundly speculative eyes .sx The collection included a number of common latch-keys , a graded set of blanks ( how on earth had Polton managed to acquire those blanks , so strictly forbidden by the law ?sx ) and a bunch of skeleton keys of the pipe variety , simple in construction but undeniably felonious in aspect .sx I asked no questions concerning those keys , reserving to myself the prospective entertainment of seeing them .sx produced and put to their mysterious use ; as to which I could form no sort of surmise .sx They were certainly not to let us into the house , for we had already been promised free admittance .sx But it was useless to speculate .sx The explanation would come all in good time , and now the research case , having received its lading , was closed and fastened and we were due to start .sx At Stratford , we found the Superintendent ready to receive us and in the same helpful spirit as on the preceding day .sx " You are full early , gentlemen , " he remarked , " as matters stand .sx The inquest opens , as you know , at four p.m. , and the doctor has fixed two p.m. for the post-mortem .sx So you'll have plenty of time to survey the 'scene of the tragedy,' as the newspapers call it , though I don't fancy that you'll spend your time very profitably .sx However , that's your affair .sx You are acting for the executor , as I understand , so I suppose you have got to make a show of doing something .sx " " Exactly , " Thorndyke agreed .sx " A specialist must make a demonstration of some kind .sx You gave my letter to the coroner ?sx " " Yes , sir .sx And it is just as well that you had it .sx Otherwise I don't fancy you'd have got many facilities .sx He's rather a touchy man and he seemed disposed to resent your coming here to hold what he calls `an unofficial inquiry of your own .sx ' However , it is all right .sx I am to let you see anything that you want to see , and the medical witness - he is the police surgeon's deputy - has got the same instructions .sx And now I expect you would like to start .sx I've got the key here , but I can't give it to you in case the coroner wants to inspect the place himself .sx Besides , you'll want someone to show you where it is .sx " He stepped to the door , and , looking into the adjoining office , called out :sx " Marshall , just take these two gentlemen down to number five Piper's Row .sx You needn't stay .sx Just let them into the house and bring the key back to me .sx " As he spoke , he produced from the nest of drawers a key with a wooden label attached to it which he handed to the constable ; and I noticed that , as it passed from hand to hand , Thorndyke bestowed a quick glance on it , and I suspected that he was memorising its shape and size .sx It was , however , but a momentary glance , for the key disappeared immediately into the constabulary pocket and the officer , with a salute to his superior , turned and led the way out into the street .sx The town of Stratford is not strikingly prepossessing in any part .sx There is nothing of the residential suburb about it .sx But the district to which we were conducted by Constable Marshall seemed to reach the very limit of what is attainable in the way of repulsive squalor by the most advanced developments of modern industry .sx Turning out of the High Street by Abbey Lane , we presently emerged from the inhabited areas on to a dreary expanse of marsh , on which a few anaemic weeds struggled to grow in the interstices of the rubbish that littered every open space .sx Gas works , chemical works , pumping stations and various large buildings of the mill or factory type arose on all sides , each accompanied by its group of tall chimney-shafts , all belching forth smoke and each diffusing the particular stench appropriate to the industry that it represented .sx A few rough roads , like urbanised cart tracks , flanked by drainage ditches , meandered across this region , and along one of these we picked our way until it brought us to the place where , as the Superintendent .sx bluntly but justly expressed it , " some fool had built " Piper's Row .sx " Not much to look at , are they , sir ?sx " Constable Marshall remarked in comment on our disparaging glances at the unspeakably sordid , ruinous little hovels .sx " Mr. Holker bought them for a song , but I fancy he's going to lose his money all the same .sx This is the one .sx " He halted at a decaying door bearing the number 5 , fished the key out of his pocket , inserted it , gave it a turn and pushed the door open .sx Then , as we entered , he withdrew the key , wished us " good morning , " closed the door and took his departure .sx For some moments Thorndyke stood looking about the tiny room - for there was no hall , the sitting-room opening directly on the street - letting his eye travel over its scanty details ; the rusty grate , the little cupboard in the recess , the small , low window and especially the floor .sx He stepped across and tried the door of the cupboard , and , finding it locked , remarked that Holker had probably used it to stow away his tools .sx " You notice , Jervis , " he added , " that the appearance of the floor does not seem to support the theory that the house was entered by the window .sx There are foot-marks under the window , certainly , but they are quite faint , whereas there are well-marked prints of muddy feet , two pairs at least , leading from the street door to the next room , which I suppose is the kitchen .sx " " Yes , I see that , " I replied ; " but as we don't know whose foot-prints they are or when they were made , the observation doesn't carry us very far .sx " " Still , " he rejoined , " we note their existence and observe that they proceed , getting rapidly fainter , direct to the kitchen .sx " He passed through the open doorway , still narrowly examining the floor , and halted in the kitchen to look round .sx But , beyond the faint marks on the floor , .sx there was nothing to attract notice , and , after a brief inspection , we went on to the wash-house , which was what we had actually come to see .sx Apparently , the place had been left in the condition in which it had been found by Holker , for the decrepit Windsor chair still lay on its side , while almost directly above it a length of thinnish brown rope hung down from a short beam that connected the principal pair of rafters .sx At this Thorndyke , when he had finished his scrutiny of the floor , looked with an expression of interest that it hardly seemed to warrant .sx " The Superintendent , " he remarked , " spoke of a tie beam .sx It is only a matter of terminology , but this is rather what architects would call a collar beam .sx But the fact is of some interest .sx A tie beam , in a building of this size , would be within comfortable reach of a short man .sx But this beam is fully eight feet above the floor .sx Even with the aid of the chair , it is not so very accessible .sx " " No .sx But the rope could have been thrown over and pulled taut after the knot was tied .sx It is made fast with a fisherman's bend , which would run up close when the rope was hauled on .sx " " Yes , " he agreed , " that is so .sx And , by the way , the character of the knot is worth noting .sx There is something rather distinctive about a fisherman's bend .sx " He stood looking up thoughtfully at the knot , from which a long end hung down beside the " standing part , " which had been cut , as if the rope had been longer than was necessary for the purpose .sx Then he took the cut end in his hand and examined it minutely , first with the naked eye and then with the aid of a pocket lens .sx Finally , slipping on a glove , he picked up the chair , and , mounting on it , began deliberately to untie the knot .sx " Is that quite in order , Thorndyke ?sx " I protested .sx " We had permission to inspect the premises , but I don't think we were expected to disturb anything .sx " " We are not going to disturb anything in any essential sense , " he replied .sx " When we have finished , we shall re-tie the knot and put the chair as we found it .sx That will be good enough for the coroner's jury .sx You might give me the tape out of the case .sx " I opened the case and took out the long tape , which I handed to him and watched him as he carefully measured the rope and entered the length in his notebook .sx It seemed an unaccountable proceeding , but I made no comment until he had re-fastened the rope and stepped down from the chair .sx Then I ventured to remark :sx " I should like to know why you measured that rope , Thorndyke .sx It seems to me that its length can have no possible bearing on anything connected with the case that we are investigating .sx Evidently I am wrong .sx " " When we are collecting facts , " he replied , " especially when we are absolutely in the dark , we are not bound to consider their relevancy in advance .sx The length of this rope is a fact and that fact might acquire later some relevancy which it does not appear to have now .sx There is no harm in noting irrelevant facts , but a great deal of harm in leaving any fact unnoted .sx