Railroad mortar.these nine men are the executive committee that controlled the actions of the great mortar, and a glance at them shows that they were picked men for the job — men in the prime of life, brawny and strong — they were the slaves of their pet monster. Some shots from this gun went much farther than they were ever intended, carrying their fiery trails over the Confederate entrenchments and exploding within the limits of the town itself, over two and a quarter miles. The roar of the explosion carried consternation to all within hearing. In the lower picture is the great mortar resting in the position it occupied longest, near Battery no. 4.