||Description / Note
|1 Jan 2009
||First published version
|11 July 2009
||9 - Cooper (1807)
||1807 state discovered
Ref Item indicates the map reference subject to revision.
The 'Type' column reflects the nature of the revision in 3 basic classes:
'New' for fresh information not found in previous editions
'Revised' for the same information, just re-worked or re-arranged
'Corrected' for corrections and typos.