The Pawnee, commanded by Commander Rowan, accompanied by the tender James Guy, left Acquia, Creek, Va., this morning for Matthias Point, carrying Capt. Woodbury, U. S. Engineers, and Capt. Palmer, U. S. Topographical Engineers, to make a reconnoissance, to learn whether batteries were or were not being erected there. At 5 A. M. Capt. Rowan sent an expedition of 40 men, sailors and marines, ashore in two boats, in charge of Lieut. Chaplin and Master Blue, all under Capt. Woodbury's command. As the steamer approached the rebels showed themselves in considerable numbers, but they scampered over the hills when the ship directed a few shells against them, and they were kept in check by an occasional shell while the expedition was ashore, enabling it to accomplish its work unmolested. Its sailors captured two horses, saddled and bridled, compelling the riders to seek safety in flight. One of the men received a slight wound in the wrist from a revolver shot. The horses were brought off, hoisted into the James Guy, and sent to the Washington Navy Yard as prizes. During the reconnoissance the Pawnee threw 30 shells, which kept the enemy in check, though their reported force there is 600 men, 100 or more being mounted. The party that landed saw the enemy's camp from Grimes's house on the lill, and having, on their return to the Pawnee, found out its direction, Com. Rowan put his ship in a proper position within the shoal, and shelled it, completely dispersing the camp, and setting fire to something behind the hill. A negro man came off to the ship, and gave information that 200 of the enemy are kept constantly on the beach, and the remainder in the camp. The Pawnee was relieved for the trip by the Freeborn, which took her place at the creek.--Rowan's Official Report.
This day the steamer Monticello had a fight with the rebels on the Rappahannock River, in Va. The steamer was on a reconnoitring expedition, and after she had proceeded a few miles, the pilot, Mr. Phillips, went ashore in a launch, with twelve of the crew, for the purpose of obtaining information as to whether  there were any masked batteries in the vicinity. They landed on the farm of Mr. Gersham, when Mr. Phillips proceeded, unaccompanied, to the house, and was advised by the owner to return to his boat as quickly as possible, as there was danger abroad. The pilot took the advice, but had not proceeded far when a party of about fifty rebels made their appearance and commenced firing at those in the launch, who were lying on their oars waiting the return of Mr. Phillips; the boat immediately put off in the direction of the Monticello, leaving Mr. Phillips ashore. The commander of the steamer ordered the boat to return for him, and immediately opened fire upon the party on shore, causing them to disperse in double-quick time. During the firing upon the launch one of the crew was killed, Augustus Peterson, and Surgeon Heber Smith mortally wounded, and six others hurt by splinters and bullets. Their boat and oars were completely riddled by the flying missiles.--(Doc. 36.) The steamer Quaker City also had a short engagement this morning with a large number of rebel dragoons. While cruising in Lynn Haven Bay, near Cape Henry, Commander Carr picked up a man named Lynch, a refugee from Norfolk, who represented that the master plumber of the Norfolk Navy Yard was ashore and wished to be taken off. An armed boat which was sent for the purpose was fired upon when near the shore, mortally wounding James Lloyd, a seaman, of Charlestown, Mass. A few thirty-two-pound shells dispersed the rebels.--N. Y. Evening Post, June 26.
The blockade at the Louisville end of the Nashville Railroad commenced to-day. Nothing is allowed to pass except by permission of the surveyor of the port.--N. Y. Herald, June 26.
Isham G. Harris, governor of Tennessee, issued a proclamation declaring that State independent of the Federal Government, and giving the official vote on secession.--(Doc. 37.)
At Washington a detachment of the New York Fourteenth Regiment arrested a spy this morning, who had full details of the number of troops, position, and strength of batteries around that city. There was also found upon him a sketch of plan of attack upon the city. He had the positions of all the mounted cannon in that vicinity. The scouts of the New Hampshire Second Regiment wounded a man this morning, who was approaching the lines and observing carefully the position of the camps and batteries. He pretended to be unable to speak English at first, but recovered his knowledge of the language as soon as he was shot.--N. Y. Commercial Advertiser, June 25.
The Thirty-first Regiment N. Y. S. V., commanded by Col. Calvin C. Pratt, struck their tents at Riker's Island and departed for the seat of war.--(Doc. 38.)
Five companies of cavalry, six companies of infantry and dragoons, ten companies of volunteers — in all about 1,590 men with one battery, under command of Major S. D. Sturgis, left Kansas City to-day at 1 P. M., destined for south-western Missouri.--Sandusky Register, June 25.
A proclamation of neutrality by Napoleon III. was received in America.--(Doc. 39.) The Tenth Regiment of Ohio troops left Camp Dennison for Western Virginia.--National Intelligencer, June 26.