All day long the firing continued--musketry and cannon. Our artillery gave up the attempt to fight on the firing line, and was withdrawn well to the rear out of range of the Spanish rifles; so far as we could see, it accomplished very little. The dynamite gun was brought up to the right of the regimental line. It was more effective than the regular artillery because it was fired with smokeless powder, and as it was used like a mortar from behind the hill, it did not betray its presence, and those firing it suffered no loss. Every few shots it got out of order, and the Rough Rider machinists and those furnished by Lieutenant Parker--whom we by this time began to consider as an exceedingly valuable member of our own regiment--would spend an hour or two in setting it right. Sergeant Borrowe had charge of it and handled it well. With him was Sergeant Guitilias, a gallant old fellow, a veteran of the Civil War, whose duties were properly those of standard-bearer, he having charge of the yellow cavalry standard of the regiment; but in the Cuban campaign he was given the more active work of helping run the dynamite gun. The shots from the dynamite gun made a terrific explosion, but they did not seem to go accurately. Once one of them struck a Spanish trench and wrecked part of it. On another occasion one struck a big building, from which there promptly swarmed both Spanish cavalry and infantry, on whom the Colt automatic guns played with good effect, during the minute that elapsed before they could get other cover. These Colt automatic guns were not, on the whole, very successful. The gun detail was under the charge of Sergeant (afterward Lieutenant) Tiffany, assisted by some of our best men, like Stevens, Crowninshield, Bradley, Smith, and Herrig. The guns were mounted on tripods. They were too heavy for men to carry any distance and we could not always get mules. They would have been more effective if mounted on wheels, as the Gatlings were. Moreover, they proved more delicate than the Gatlings, and very readily got out of order. A further and serious disadvantage was that they did not use the Krag ammunition, as the Gatlings did, but the Mauser ammunition. The Spanish cartridges which we captured came in quite handily for this reason. Parker took the same fatherly interest in these two Colts that he did in the dynamite gun, and finally I put all three and their men under his immediate care, so that he had a battery of seven guns.