Next to his own office stood the instrument room. Here, behind double doors that deadened every sound, were ranged the telephones, the tape machines, the Fessenden-d'Arco installation, and that most modern development of wireless telegraphy which had come just in time to save the over-burdened postal system from chronic congestion, the telescribe. Hampden had not appeared to move hurriedly, but it was just seventeen seconds after he had sent his brougham roving eastward that he stood before the telephone. "1432 St Paul's, please." There was a sound as of rushing water and crackling underwood. Then the wire seemed to clear itself like a swimmer rising from the sea, and a quiet, far-away voice was whispering in his ear: "Yes, I'm Lidiat." "I am at Trafalgar Chambers," said Hampden, after giving his name. "I want you to drop _anything_ you are on and come here. If my motor is not waiting for you at the corner of Chancery Lane, you will meet it along the Strand." At the other end of the wire, Lidiat--the man who possessed the sixth code typewriter--looked rather blankly at his pipe, at the little silver carriage clock ticking on the mantelpiece, at the fluted white-ware coffee set, and at his crowded desk. Then, concluding that if the President of the Unity League sent a message of that kind after midnight and immediately rang off again he must have a good reason for it, he locked up his room as it stood, took up a few articles promiscuously from the rack in the hall, and walked out under the antique archway into Fleet Street. In the meantime the Exchange was being urged to make another attempt to get on with "2743 Vincent," this time with success. "Mr Salt is not 'ere, I repeat, sir," an indignant voice was protesting. "He is out of town." "Yes, yes, Dobson, I know," replied "St James's." "I am Sir John Hampden. What train did your master go by?" "Beg pardon, sir," apologised "Vincent." "Didn't recognise your voice at first, Sir John. The wires here is 'issing 'orrible to-night. He went by the 10 o'clock from the Great Central, and told me to meet the 10.40 Midland to-morrow morning." "He did actually go by the 10 train?" "I 'anded him the despatch case through the carriage window not five minutes before the whistle went. He was sitting with his----" "Thank you, Dobson. That's all I wanted to know. Sorry if you had to get up. Good night," and Sir John cut off a volume of amiable verbosity as he heard the bell of his Launceston ring in the street below.