At last, however, the engineer paused a moment in his headlong course through sentence after sentence, held his pen half irresolute over a new blank sheet, and turning round to Tyrrel, without one word of apology, said, in a quick, decisive voice, "This is business, I suppose, business? for if not, I've no time. I'm very pressed this morning. Very pressed, indeed. Very pressed and occupied." "Yes, it is business," Tyrrel answered, promptly, taking his cue with Celtic quickness. "Business that may be worth a good deal of money." Erasmus Walker pricked up his ears at that welcome sound, and let the pen drop quietly into the rack by his side. "Only I'm afraid I must ask for a quarter of an hour or so of your valuable time. You will not find it thrown away. You can name your own price for it." "My dear sir," the engineer replied, taking up his visitor's card again and gazing at it hard with a certain inquiring scrutiny, "if it's business, and business of an important character, of course I need hardly say I'm very glad to attend to you. There are so many people who come bothering me for nothing, don't you know--charitable appeals or what not--that I'm obliged to make a hard and fast rule about interviews. But if it's business you mean, I'm your man at once. I live for public works. Go ahead. I'm all attention." He wheeled round in his revolving chair, and faced Tyrrel in an attitude of sharp practical eagerness. His eye was all alert. It was clear, the man was keen on every passing chance of a stray hundred or two extra. His keenness disconcerted the conscientious and idealistic Cornishman. For a second or two Tyrrel debated how to open fire upon so unwonted an enemy. At last he began, stammering, "I've a friend who has made a design for the Wharfedale Viaduct." "Exactly," Erasmus Walker answered, pouncing down upon him like a hawk. "And I've made one too. And as mine's in the field, why, your friend's is waste paper." His sharpness half silenced Tyrrel. But with an effort the younger man went on, in spite of interruption. "That's precisely what I've come about," he said; "I know that already. If only you'll have patience and hear me out while I unfold my plan, you'll find what I have to propose is all to your own interest. I'm prepared to pay well for the arrangement I ask. Will you name your own price for half an hour's conversation, and then listen to me straight on and without further interruption?"