Convictions ron Munnsn.—On Friday lail a nmn named William Nawroan vu found guilty of illo wilful murder of Henry flougnn, at Patrick's Plain*, on ilia 13th Oclolnr last, by stubbing him with a knifo nml inflicting a wound which can-ed hi* death. Newman, in hi- «1» fence, denied all knowledge of the itiT.tir. Hi* Honor the Chief Justice passed sonumce of death upon him.On Saturday three men, John Martin, Jurne* Mason, and John Wulfcer, wero indicted and found utility of the murder of John Johnstone, at Gammon, on the 24th of March last. The ividenco against them was completely plain. From tho examination of the wi metises, there is great rmson to believe that Martin took the l:fe of liir com rad o, that notorious villain Opossum Jack. The following!* Jlis Honor-speech in jtn»ing sentence on them as reported in the S'/ttney Herald Proolumaiion being made, his Honor, in o feeling and impressive address, commented on ihe muss of crime which the trial had brought into view us connected with Martin, which ho regarded as bring un p irnh lled in the history of the colony, a- there wua good reason for believing that he had frequently imbru'd hi- bands in the blood of bis h llow creatures. From the details given on this trial there wore stronj reasons for believing llutt his old confederate, Op possum Jack, who had boon the ecnurgo and terror of the colony, had boon destroyed by him. It was also clear}) proved that ho had shot tho deceased man, Johnstone, while hU attempts to deprive his accomplice Oi overs of life was encli as to strike terror to the heart of every ouo who heard the details given by that individual, llis Honor ulso stated that the blood of Mason and Walker, the youths who stood with him nt the bur, was also chargeablj on bis bead; and after having admonished encli of them to prepare for a future state, he passed sentence of death on nil of them in the usual form. Tho prisoners heard tb-ir awful sentenc'd unmoved, and Appeared unaffected by what had been said to them.Water Police Court. —A coloured manoffnJito*1'ou10ibCtliti:oltla*8:rc\nlrc£.£in£d.laI”hir47.inrc£Itnlttihi