At five o’clock on the evening of the 18th of March in the year already mentioned a train left Euston Station for Manchester. It was a rainy, squally day, which grew wilder as it progressed, so it was by no means the weather in which any one would travel who was not driven to do so by necessity. The train, however, is a favourite one among Manchester business men who are returning from town, for it does the journey in four hours and twenty minutes, with only three stoppages upon the way. In spite of the inclement evening it was, therefore, fairly well filled upon the occasion of which I speak. The guard of the train was a tried servant of the company—a man who had worked for twenty-two years without blemish or complaint. His name was John Palmer. The station clock was upon the stroke of five, and the guard was about to give the customary signal to the engine-driver when he observed two belated passengers hurrying down the platform. The one was an exceptionally tall man, dressed in a long black overcoat with Astrakhan collar and cuffs. I have already said that the evening was an inclement one, and the tall traveller had the high, warm collar turned up to protect his throat against the bitter March wind. He appeared, as far as the guard could judge by so hurried an inspection, to be a man between fifty and sixty years of age, who had retained a good deal of the vigour and activity of his youth. In one hand he carried a brown leather Gladstone bag. His companion was a lady, tall and erect, walking with a vigorous step which outpaced the gentleman beside her. She wore a long, fawn-coloured dust-cloak, a black, close-fitting toque, and a dark veil which concealed the greater part of her face. The two might very well have passed as father and daughter. They walked swiftly down the line of carriages, glancing in at the windows, until the guard, John Palmer, overtook them. “Now, then, sir, look sharp, the train is going,” said he. “First-class,” the man answered. The guard turned the handle of the nearest door. In the carriage, which he had opened, there sat a small man with a cigar in his mouth. His appearance seems to have impressed itself upon the guard’s memory, for he was prepared, afterwards, to describe or to identify him. He was a man of thirty-four or thirty-five years of age, dressed in some grey material, sharp-nosed, alert, with a ruddy, weather-beaten face, and a small, closely cropped black beard. He glanced up as the door was opened. The tall man paused with his foot upon the step. “This is a smoking compartment. The lady dislikes smoke,” said he, looking round at the guard.