A dreadful phenomenon described and improved: being a particular account of the sudden stoppage of the River Severn, and of the terrible desolation that happened at the Birches between Coalbrook-Dale and Buildwas Bridge in Shropshire. On Thursday morning, May the 27th, 1773. And The Substance of a Sermon Preached the next Day, on the Ruins, to a vast Concourse of Spectators. By John Fletcher, Vicar of Madeley in Shropshire, and Chaplain to to the Right Hon. the Earl of Buchan.