19igneuj if iv rx m. hiaaium,Secretary of War.PurtlculurM of (he Awuuwlnultonof Nferrlnrj Nrward.Wasijixuto.n, April 17.—Geo. F. Robin-son, a 6olilier and nurse who was in Btteud-anco on Secretary Seward on Friday night, has related clrcunistantlnll the proceedings in the chamber, from whicb it appears that It was through his brave and determined endeavors that the consummation of tbe murderous designs of the fiends were frustrated.According to Robinson's narrative Frederick W. Seward, Major Seward and Sir. Hansell were all wounded on tl^stalrway, as heretofore mentioned in this correspondence. As ItublnHon opened the door to learn tiie cause of the disturbance without, the man struck at his breast. In his hand lie had a long knife, the blade of which appeared to be about Id inches in length and one inch In width. Robinson, determined to oppose his progress, raised his arm to parry the blow, the consequent was that a wound was Indicted in the center of his forehead, close to the hair, whlph lie wears turned back. The knife glanced, and the clenched hand in which the man held the dagger came down upon Sir. Robinson's face and felled him to tho floor. Miss Seward, at this juncture, escaped from the room and ran to the front window sereuining murder. The assassin leaped to the bed where Mr. Seward lay still apparently in a helpless condition and gave a tremendous blow at hU face. He missed his mark, however, arid almost fell across Mr. Seward's body. Bv this time Robinson bud recovered, jumped on the bed and caught hold of the assassin's arms. While he was thus attempting to hold the assassin, the latter struck M r. Seward on the left aide of the face and then oil the right side. The assassin then raised up and ho and Robinson came to the floor together; they both got or, to their feet, Robinson keeping a Arm hold of him. The assassin reached his left arm over Robinson's shoulder and endeavored to force him lo the floor. Finding he could not handle Robinson In that position, he dropped Ids pistol which had been forced against Kobluaou’s face in the hand which was around his neck, caught hold ol Robinson's right arm with his left hand anil struck behind Robinson with the knife. They continued the struggle tor a few mi -meats, Robinson forcing him towards (lie door, which was open, with the Intention of throwing 1dm over the banisters. When they had nearly reached tliu door Major Augustus Seward entered the room. Robinson called 011 him to take the knife out of the assassins baud. Major Seward immediately clutched the assassin. The latter tlionstruek Robinson in thestomach, knocking him down, broke away from Major Seward and rushed down stairs.During the scuffle, when, he cannot say, Robinson received a wound, quite serious, some two inches in breadth, on the upper part of the right shoulder blade, another a little lower down on the same side, and a slight ono on the left shoulder. While struggling with the man near the bedside he liail seized tiie wrist of his right hand, in which was the dagger, and did not release his hold until knocked down bv the assassin near the door, and after Major Seward had come to his assistance. He returned to the room after he found that tiie assassin had escaped and found that the Secretary hud got oflthe bod on to the floor, dragging with him the bed clothes and was lying in a pool of blood. Upon going to the Secretary ho found no pulse in Ids wrist and stated so to Miss Seward, who had re-tmtered tbe room and asked if her lather wns dead. He said that he liclievcd he was; but upon a second examination Robinson ascertained that his heart was still beating. The Secretary then said: “I am not dead. Send for the police and a surgeon and close the house. He then placed the Secretary on the bed, telling him he must not talk. Mr. Seward did not speak after that.Mr. Rol^jison remained with Mr. Seward until 11 o'clock the next morning, when lie was removed to the Dougins hospital. Every attention is being paid to this brave man by the attendants ol this Institution, and his condition is very favorable.The Amuitsla ol* Hocrctury Ncvrurtl Arrceted—Rnraored Marrenderof Johnston.New York, April 18.—The Herald’s special says it is reported that the assassin who entered Mr. Seward's house lias been arrested. It is certain one of the assassins, probably Surratt, lias been arretted. Samuel Mattnm, of liookstowu. Md., the one who wrote tbo letter found In Booth's trunk, signed Sam. has been arrested.The Herald’s Newburn correspondent of the lllh. gives a rumor that Johnston was about tosurrender.A State Convention to consist of delegates from all the counties is called for flie 14th of May.The Herald's Richmond dispatch of the 18th, says Gen. Lee arrived in that city at half past three P. M. on tbe loth. He and