Brock’s manufactory, and the factory of Mr. M’Devitt adjoining, were blown to a considerable height, and the falling materials did considerable mischief. After the agitation was somewhat subsided, an inquiry into the cause of the accident took place, when it appeared from the statement of the two boys (who were blown a considerable height and were much injured) that they were at work, ramming the rockets, when the ramrod struck against the funnel, and the friction caused a spark, which flew into the bowl of gunpowder that stood near them; this soon exploded, and ran like a train to all the other fireworks in the factory, and at length communicated to the magazines, which caused the disaster. Mr. Brock, however, declares that it could not have arisen in that way, as the nipple of the funnel was copper, therefore a friction would not cause a spark. One poor woman, sister to the beadle, who lives next door to Mr. Brock, was so dreadfully injured by the broken glass that she lies in the London Hospital without hopes of recovery. Ten houses were seriously damaged, and over sixty had their windows broken from top to bottom.” It will be seen from the foregoing that Brock was in advance of his time as regards precautions against explosions, which, however, in this case proved to some extent ineffective. An accident took place in 1838 at the premises of Cockerill, in Paradise Row, Lower Road, Islington. Three persons were killed, and the proprietor was so severely hurt in an attempt to rescue his family that he died later. The following year an accident took place at 6 Edward Street, Bethnal Green, in which three persons were injured. The explosion was caused by a spark from the fire falling on a quantity of loose powder lying on the table, the flash from which was communicated to a barrel of powder near. The report continues: “The most miserable negligence was displayed by the persons engaged in the fabrication of the fireworks, as just previous to the accident one of the individuals was making a squib by the fire with a lighted pipe in his mouth.” The pyrotechnist’s name is not recorded. An explosion took place in 1841 at 6 Hatfield Place, Westminster Road, Lambeth, at the works of Drewett. Considerable damage was done, but fortunately no one was injured.