DAGENHAM, (Essex) is a manor in the liberty of Havering, 9 m. from London, which bel. some time ago to Rich. Comins, and since to Sir Will. Humfreys, Bt. A breach was made here, near 40 years ago, by the Thames, which laid near 5000 acres of Land under water; but, after near 10 years inundation, during which the works were several times blown up, it was at last stopped by Capt. Perry, who had been employed several years in the Czar of Muscovy's works at Veronitza on the r. Don. Here was formerly a chantry.