Two hundred Spaniards were captured and twenty killed, including the commander, Rafael Igleseas, and three other officers. Five Americans were wounded. _August 9._ Gen. Fred Grant, his staff, and six companies of the First Kentucky regiment sailed for Porto Rico from Newport News on the transport _Alamo_. “PONCE, August 9. “_Secretary of War, Washington_:—The following received from General Wilson: “‘General Ernst’s brigade captured Coamo 8.30 this morning. Sixteenth Pennsylvania, Colonel Hulings commanding, led by Lieutenant-Colonel Biddle, of my staff, having made a turning movement through the mountains, striking the Aibonito road half a mile beyond town, captured the entire garrison of Coamo, about 150 men. “‘Spanish commander, Igleseas, and Captain Lopez killed. Our loss reported six wounded, only one severely. Men and officers behaving excellently.’ “Colonel Hulings and Colonel Biddle are especially to be commended. This is a very important capture, and well executed. Names of wounded as soon as received here. (Signed) “MILES.” Troop C, of New York, pursued a party of fleeing Spanish engineers, after the capture of Coamo, a distance of four miles along the road to Aibonito. The Americans were checked at the Cuyon River, where the Spaniards had blown up the bridge, and were shelled from a Spanish battery on the crest of Asoniante Mountain. The dismounted cavalry returned the fire, receiving no damage, and holding the position. A battalion of the Third Wisconsin Volunteers went to their support. _August 11._ “PONCE, VIA BERMUDA, August 11. “_Secretary of War, Washington_:—The following message received from Schwan: “‘CAMP, NEAR HORMIGUEROS, August 10. “‘Advance guard, including cavalry of this command, while reconnoitring northwest of Rosario River, near Hormigueros, developed strong Spanish force, which lay concealed in hills north of Mayaguez. “‘In general engagement that followed, Lieutenant Byron, Eighth Cavalry, my aid-de-camp, was wounded in foot, and Private Fermberger, Company D, Eleventh Infantry, and one other private were killed, and fourteen enlisted men were wounded. “‘It is reported that the most, if not the entire Spanish garrison of Mayaguez and surrounding country, consisting of one thousand regulars and two hundred volunteers, took part in the engagement. We drove enemy from his position, and it is believed inflicted heavy loss. “‘A wounded Spanish lieutenant was found in the field and brought into our line. Conduct of officers and men was beyond all praise. I propose to continue my march on Mayaguez at early hour to-morrow. “‘SCHWAN.’ (Signed) “MILES.”