CAPTURED.The Little Neck Murder—Ar-♦rest of One of the Murderers.The Others in Charlestown State Prison A Confession from One of the Criminals —Patrick Donohue) who Struck the : Fatal Blow* a Prisoner in the: Hcmpsteal Jail—-The Authorities Convinced thatThey Have got theBight Parties,On the 20th of March last, two men werearrested for highway robbery, in Springfield, Maas. They stopped a man on the the street, end by foroe, and •with threats of violence, robbod him of two dollars, all the money he had in his possession. For this offence he was arrested, tried, and convicted, and sentenced to twenty year’s imprisonment each in the Charlestown State Prison. They said their names were respectively, lynch and Green. The latter prisoner’s wife lived in Little Neck.Being an illiterate woman she asked a neighbor to read her husband's letters that wore written in the prison. These letters disclosed the fact that Green was an accomplice in the murder of Graham, at Little Neck, on the 7th of February last. This intelligence reached Mr. John H. Walght, a eoBBtable in Flushing, and he communicated it to the town authorities. Mr. Wright, formerly a New York policeman ©f tried ability, had worked indefatigabiy to solve the mystery of the Graham murder, and he suggested a plan toWORK UP THE CASE.On this suggestion an officer high in authority acted. This officer requests that his name shall bo withheld for the present. Ho went to tho Charlestown Prison and had an interview with Green, who madeA FULL CONFESSIONof Ms participation in the crime, how it was committed, and who his accomplices were. Green lived about a mile from Graham’s residence. Lynch’s abode was at 81 Boosevelt street, New York. One Patrick Donohue^ a peddler of pictures, boarded with Lynch. In his travels through Long Island Donohue became acquainted with Green and also with Graham. At Graham’s shop he was in the habit of leaving a number ofpictures when he was overloaded.Just previous to the murder Green quitted Little Neck and went with Donohue to beard at Lynch’s in Roosevelt street. There the threo conoocted the murder. The night the crime was committed Donohue went in and said to Grahamt “I have a friend outside who wants to buy a pair of bootB.” Graham responded, “Let him come in.” The “friend” was Lynch. Lynch wont in and Graham banded him some boots to try on,Green, standing outside meanwhile on guard. As Graham stooped down to “feel of the fit, Lynch drew an eighteen inch bar from his inner breast pocket and struck him on the back of the head, and as he partially recoveredANOTHER BLOW was given across the forehead, and still another. Thecombined effect of these blows proved mortal, and the murderers then proceeded to rob the plaoe. Their subsequent travels and crimes are known to theEagle but are suppressed to aid the ends of justice. Green gave a full description of Donahue and the Flushing official referred to, convinced that tho prisoner was revealing tho truth, conferred wita the New York authorities. Detective Riley of the Central Police office was detailed to watch tho house 81 Kosevelt street, . This he did until Friday last when, in consequence of urgent business, he was temporarily relieved, bul tho officer who succeeded him was fortunate enough to see a man closely answering Doarhiie’s dheription, enaer the house. Following him in he saw him entermbs. Lynch’s apartmentsand arrested him. He was taken to Flushing on Saturday, committed on Sunday, and on the following day sent to the jail in Hempstead. The Flushing official who., had received Green’s confession, which he had presented to the Grand Jury, and on which the Indictment was granted,INTERVIEWED DONOHUEin tho Hempstead Jail, The prisoner said his name was Patrick Gilligan; that he was introduced to the Lynchs in August Iasi by one Stone, and that he went fchez'e to board at that time, being then employed in a stone yard in Harlem.He further said that he bad brothers and sisters liv-ibg in New York, and spoke ©f other relations and ac-quaintanees, in some instances giving their addresses, bnt, none of them have yet called to see him. He told conflicting stories, and impressed bis hearer with the belief that ho was lying witbont restraint. He will he brought up for examination on the 17th inst., and it remains to be seen whether he can then prove himself to be Patrick Gilligan, or whether the Charlestown prisoners will identify him as Patrick Donohue.THEIB ACCOMPLICES in the Graham murder.Gilligan, as the prisoner calls himself, answers thedescription, of Donohue, except that his hair is shorter, and his dresB changed. He is seemingly thirty years of age, although he claims to be only twenty-two. His bancs are hard and horny, showing evidences of manual labor. Like Lynch »nlt;f Green, his face exhibits 11 ttte or nothing tnatis intelligent, and the observer readily conceives that his conduct Is governed by no moral perception of rectitude*Judging from his features, he is capable of committing any and every known crime. The authorities have no doubt of his identity as Patrick Donahue, whom his confessed accomplice, Green, will swear struck the blows that killed the unoffending Graham.Fuller particulars of greater importance were detailed to the Eagle reporter by the Flashing authorities, with a request to not make them puhlio at present, as it would interfere with the ends of justice.