from the mouth of the tunnel, and the doctor immediately gave him a careful examination. There was a depressed fracture at the back of the skull, which must have caused his death; but how he came by it was not so clear. On examining the whole place most carefully, we saw, further, that there were marks on the rocks at the steep side of the embankment as if some one had tried to scramble up them. Why the poor fellow had attempted such a climb, God only knows. In doing so he must have slipped and fallen back on to the line, thus causing the fracture of the skull. In no case could he have gone up more than eight or ten feet, as the banks of the cutting run sheer up, almost perpendicularly, beyond that point for more than a hundred and fifty feet. There are some sharp boulders beside the line, and it was possible that he might have fallen on one of these and so sustained the injury. The affair must have occurred some time between 11.45 p.m. and 6 a.m., as the engine-driver of the express at 11.45 p.m. states that the line was signalled clear, and he also caught sight of Pritchard in his box as he passed." "This is deeply interesting," I said; "pray proceed." Bainbridge looked at me earnestly; he then continued:-- "The whole thing is shrouded in mystery. Why should Pritchard have left his box and gone down to the tunnel? Why, having done so, should he have made a wild attempt to scale the side of the cutting, an impossible feat at any time? Had danger threatened, the ordinary course of things would have been to run up the line towards the signal-box. These points are quite unexplained. Another curious fact is that death appears to have taken place just before the day-man came on duty, as the light at the mouth of the tunnel had been put out, and it was one of the night signalman's duties to do this as soon as daylight appeared; it is possible, therefore, that Pritchard went down to the tunnel for that purpose. Against this theory, however, and an objection that seems to nullify it, is the evidence of Dr. Williams, who states that when he examined the body his opinion was that death had taken place some hours before. An inquest was held on the following day, but before it took place there was a new and most important development. I now come to what I consider the crucial point in the whole story.