- unitid
-
{"value"=>"1026407", "type"=>"local_mss"}
- unitdate
-
{"value"=>"1857 September 18", "type"=>"inclusive", "normal"=>"1857-09-18"}
- unittitle
-
{"value"=>"Paulding, H. Report to the Secretary of the Navy on a survey of the isthmus of Panama by H. Paulding, Flag Officer, USN, commanding home squadron to determine feasibility of constructing an interoceanic canal"}
- container
-
{"type"=>"box", "value"=>"4"}
{"type"=>"folder", "value"=>"2"}
- date_start
-
1857-09-18
- keydate
-
1857-09-18
- date_end
-
1857-09-18
- date_inclusive_start
-
1857
- date_inclusive_end
-
1857