Yesterday morning were executed at the front of Newgate, Martin Clinch and Samuel Mackley, for the daring robbery and cruel murder of Mr Fryer, in Islington fields. An extremely disagreeable circumstance occurred shortly before the period which is usually allowed to men in their unfortunate situation. The floor of the scaffold, from some previous misarrangement, gave way, and precipitated into the area of the apparatus, Messrs Vilette and Gaffy, the latter a Catholic priest, who attended Clinch, and the two executioners; Mr. Sheriff Stains had himself a very narrow escape. Mr. Gaffy being a lusty man was severely hurt, as were both the executioners; Mr Vilette escaped with a slight bruise. The two unfortunate malefactors swung off with their distorted features exposed to the view of the distressed spectators. By the laudable activity of Mr. Ramsden, the prison surgeon, however, the cap was drawn over their faces afterwards. Their bodies were removed to a proper place for the purposes of dissection and exposure. They both denied to the last moment having had any concern in the murder. Pitts, Printer, Toy and Marble Warehouse, 6, Great St. Andrew Street, London. AN ACCOUNT OF THE COURT MARTIAL, SENTENCE, AND EXECUTION OF RICHARD PARKER FOR MUTINY, Held on board His Majesty’s ship the NEPTUNE, lying in the river Thames, off Greenhithe. The Court was formed on Thursday, June 22, 1797, and the prisoner was charged with making, and having endeavoured to make, a mutiny among the seamen of His Majesty’s ships at the Nore; with having caused assemblies of these seamen to meet frequently, and with having behaved himself contemptuously toward and disobeyed his officers. Captain Moss, of the Sandwich, was the prosecutor, and after the whole of the evidence had been gone through, the prisoner was ordered to withdraw, and the court was cleared for the purpose of leaving the members to deliberate on the sentence. In two hours and a half the Court was re-opened, and the prisoner being called in, the sentence of the Court was read by the Judge Advocate to the following purport:--“That Richard Parker do suffer death, and to be hanged by the neck on board of one of His Majesty’s ships, and at such time as the Lords of the Admiralty may think proper.”