At least 1 field must have an entry for the search to work.
Inappropriate entries may result in incorrect or no data being returned.
One useful strategy for finding what you require is to enter some appropriate criteria, view what appears, and, if you want to change the chosen year, use 'Change search values' to alter the criteria and rerun the query.
Field notes:
Event year - must be a four figure numbers, usually between 1600 and 1950 as these are the extremes of dates of events in the data.
Wildcards - Wildcards should not be used in number or date fields.
