Cup-marked boulder, Howgill Grange, Baldersdale, Hunderthwaite (Romaldkirk) - Source of Reference
The information on this website is based on a range of published and unpublished works. Below is a list of the source of information used in writing this record.
|1||Pickin, J||1993||Rock Art Survey|
|2||1998 to 1999||Monuments Protection Programme County Durham Accelerated Scheduling Programme Folder: Area 4 Baldersdale Northside||AI Reference Number: 148710|