J. A. Robertson:
Norfolk Southern Freight Crossing the Susquehanna River, Rockville, Pennsylvania
J. A. Robertson:
Bridal Veil Falls, Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
National Memorial Arch, Valley Forge National Memorial Park, Chester County, Pennsylvania
J. A. Robertson:
Dahlia, Longwood Gardens Dahlia Show, Kennett Square, Pennsylvania
J. A. Robertson:
Main Falls, Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Harry Packer Mansion (1874), Jim Thorpe, Pennsylvania
J. A. Robertson:
Caboose Motel, Titusville, Pennsylvania
J. A. Robertson:
Drake's Well, Cherrytree Township, Venango County, Pennsylvania
J. A. Robertson:
Dahlia, Longwood Gardens Dahlia Show, Kennett Square, Pennsylvania
J. A. Robertson:
Dahlia, Longwood Gardens Dahlia Show, Kennett Square, Pennsylvania
J. A. Robertson:
Dahlia, Longwood Gardens Dahlia Show, Kennett Square, Pennsylvania
J. A. Robertson:
Dahlia, Longwood Gardens Dahlia Show, Kennett Square, Pennsylvania
J. A. Robertson:
Knox Covered Bridge, Valley Forge National Historical Park, Pennsylvania
J. A. Robertson:
Knox Farm, Valley Forge National Historical Park, Pennsylvania
J. A. Robertson:
Valley Forge National Historical Park, Pennsylvania
J. A. Robertson:
Valley Forge National Historical Park, Pennsylvania
J. A. Robertson:
Valley Forge National Historical Park, Pennsylvania
J. A. Robertson:
Valley Forge National Historical Park, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
J. A. Robertson:
Bushkill Falls, Bushkill, Pennsylvania
