Preston, Lancashire the many large active Roman Catholic parish churches is St Thomas of Canterbury and the English Martyrs, located on Garstang Road. Preston was the location of the world's first foreign mission of the Church of Jesus Christ of Latter Day Saints (commonly known as the Mormons). As early as 1837 the first Mormon missionaries to Great Britain began preaching in Preston and, in particular, other small towns situated along the River Ribble. Preston is home to the world's oldest continuous branch (a small congregation) of the LDS Church. An official memorial to the church pioneers may be found in the
Preston River the Ferguson River and Joshua Creek. Minor tributaries include Thomson Brook, Crooked Brook, Charley Creek, Waterfall Gully, Mininup Brook, Millbrook and Gavin Guly. The Glen Mervyn Dam is along the Preston River. The river basin is monitored routinely as a result of eutrophication problems within the Leschenault Inlet. The water quality is fresh in many places and generally low in nutrients although some areas are slightly enriched with nitrogen. Preston River The Preston River is a river in the South West region of Western Australia. The river has a total length of and rises near Goonac siding then flows in