Haverhill has five listings in the National Register of Historic Places: the Bedell Covered Bridge (now gone); the Daniel Carr House; the Haverhill Corner Historic District; the Haverhill-Bath Covered Bridge; and the Woodsville Opera Building.
On the NRHP web site, the National Park Service provides digitized copies of the original applications nominating each to the register: both the application forms, which contain historical narratives, and the photographs that supported the applications. Here are links:
Bedell Covered Bridge
Application
Supporting Photographs
Daniel Carr House
Application
Supporting Photographs
Haverhill Corner Historic District
Application
Supporting Photographs
Haverhill-Bath Covered Bridge
Application
Supporting Photographs
Woodsville Opera Building
Application
Supporting Photographs (not yet available)