3. That my estimates of cost of transportation are ridiculously low and unreliable. 1. I did design a bridge some twenty years ago, and constructed a span near Greenfield, in Massachusetts, which gave way, owing to a defective casting, while being tested. The bridge was not finished; had not been opened to the public; had not been accepted from the contractor, who repaired the damage in such a manner that a recurrence of a break would have been impossible. I have built spans of bridges and tested them until they broke, to ascertain their ultimate strength, but I supposed that this was a matter that concerned myself and not the public. If the bridge had been thrown open for public use, and an accident had then occurred from defective design or material, the engineer might have been censurable, but not otherwise. In an experience of nearly forty years I have never had a bridge to fail, after being opened for travel, or a piece of masonry to give way. No accident occurred even upon the temporary military bridges constructed during the war, which President Lincoln used to say were built of bean poles and corn stalks. 2. How about the Hoosac Tunnel? In 1856 I undertook to build the Hoosac Tunnel, at that time ridiculed as visionary and utterly impracticable. I carried it on until 1862, when its practicability was so fully demonstrated that it was considered some discredit to Massachusetts to allow the work to proceed under engineers from another state, and honourable members of the Legislature declared that Massachusetts had engineers as competent as any that could be found in Pennsylvania. The work in my hands, as was proved by reports of investigating committees, was costing less than $2,000,000, and the trouble then was that the margin was considered too large, and that I was making too much money on the $2,000,000, which the state had agreed to advance. In 1862 the state took the work out of my hands and put it under control of state commissioners and engineers. The result was that instead of getting the Hoosac Tunnel completed for $2,000,000, which was amply sufficient in the hands of H. Haupt and Company, it has now cost, _under state management_, nearly $17,000,000. I hope this explanation will be considered sufficient to “smash” Number 2. 3. As to Number 3, the insufficiency of my estimate. The items which enter into such an estimate are pure and simple. There has been but one omission, and that is malicious mischief or deviltry, and this item is so uncertain that, without a more intimate acquaintance with “Vidi” and his supporters, I could not undertake to estimate it.