Harpers Ferry – These are grouped geographically within the park divisions, instead of chronologically.
- Bolivar Heights (List) (Map)
- School House Ridge (List) (Map)
- Maryland Heights (List) (Map)
- Lower Town (List) (Map)
Blog Posts regarding Harpers Ferry:
School House Ridge (Part 1) (Part 2)
Maryland Heights:
100-pdr Battery and Mortar Battery
Stone Fort with Interior and Exterior Forts
Maryland Heights before the Antietam Campaign
Fortifications Strengthened in 1863
Final Notes on Maryland Heights (1864-5)
To the Sound of the Guns 
Do you know if there are any photos that exist of Fort Duncan on Maryland Heights?
Jim
James, sorry for the belated reply. If you are looking for period photographs of the fortifications, my searches thus far have drawn blanks. But surely with as many photos which exist of wartime Harpers Ferry, there are at least a few out there.
James,
The library at HF has many photographs and might have something for Ft. Duncan. You may schedule a visit there usually only on a Tues or Thurs by making an appointment. It would also help if you told the librarian for what you are looking.
If you wish I can give you contact info.
Larry