On the 1st of December, 1865, the penetration at the East end was 2904 feet; at the East heading of Western shaft, 414 feet; West heading of same shaft, 280 feet; at West end heading, 756--in the whole, 4354 feet. The central shaft had been sunk two hundred and twenty feet. The average progress on this shaft during the months of August, September, October and November was 18 3-4 feet per month. Assuming this for the average in December, January and February the shaft was 275 feet deep, on the 1st of March, the whole depth to grade being 1037 feet. The average progress on the East face of Western shaft was sixty-three feet per month. Allowing that average for December, January and February, and the penetration on this face is now more than 600 feet. The average on East end was forty-four feet. Add this average for the last three months, and the penetration at this end is now 3036 feet, and the total penetration 4675 feet, with 575 feet of shaft sunk. Mr. Laurie states in his report that in the ten tunnels which he names, in this country and Europe, the average progress made on each face from a shaft was thirty-eight feet, and on the end faces fifty-four feet per month. Let the intelligent man who forms opinions and conclusions for himself, compare the statistics which have been given in the course of this writing in relation to tunneling in Europe and in this country, and then, taking into consideration the inadequate means which have, until recently, been applied to the Hoosac enterprise, and surveying the progress which has been made whenever the work was prosecuted with vigor, let him judge how soon, and at what cost, the Tunnel may be completed, even without the aid of machine drills. The concluding pages of the pamphlet contain a general charge against the commissioners, or rather Mr. Brooks, the chairman, of mismanagement. The only "_illustrations_" of this charge are, first, that Mr. Brooks declined to sell the 3,000 tons of railroad iron which had been purchased, and distributed along the graded track from Greenfield to the mountain, and "other saleable property;" second, that he has "disregarding the advice of others, whose judgment was entitled to weight, put his own constructions upon the acts of the Legislature relating to the powers and duties of the commissioners, in opposition to the construction and in defiance of the orders of the Executive Council;" third, he has seriously contemplated "the amazing folly of building the railroad from Greenfield to the mountain!"