Information partly depends on the type of record that has survived for each individual lighthouse. For some lighthouses, for example, only the visitors' book survives, while for others the records are more detailed. In all cases it is also worth looking in the Board's minutes (NLC2/1), the Secretary's Correspondence (NLC3/1-2) and the Engineering Department's bound files (NLC11/3-NLC11/4), as these often contain material relating to major events at individual lighthouses, such as the Flannan Isles accident.
