Pennington parish covers an area of three and a half miles by one and a quarter and mainly consists of small villages, hamlets and farms. It includes Carkettle, Cross-a-moor, Harlock, Holebiggerah, Horace, Loppergarth, Rathmoss, Trinkeld, Swarthmoor and Walthwaite. Of these, Swarthmoor is the only other village in the parish with any places of worship. The iron ore industry brought employment to the area and men came from as far afield as Cornwall, Wales and the Isle of Man to work here. Mining lasted for over 100 years, but declined from the 1880s due to problems with water. Three reservoirs were constructed in the mid to late 1800s.