In short, the information on the HER is as reliable as its source. The records on the HER come from a wide range of sources which vary greatly in terms of accuracy and detail. In some cases the location of a site will be a best guess based on an antiquarian or documentary reference. Unfortunately we do not have the resources to verify every site in the field, and in many cases this is no longer possible. If you can help us to improve any of our records then please let us know.