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The Delaware and Hudson Canal, looking south-west from Lock No. 21.

The Delaware and Hudson Canal, looking south-west from Lock No. 21.

New York stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

The Delaware and Hudson Canal, looking south-west from Lock No. 21.

The Delaware and Hudson Canal, looking south-west from Lock No. 21.

Picryl description: Public domain image of a park, pond, water reflection, romantic landscape, 18th-19th century, free to use, no copyright restrictions.

At Low Level, Poe Lock, Sault Ste. Marie, Mich.

At Low Level, Poe Lock, Sault Ste. Marie, Mich.

Picryl description: Public domain photo of vintage naval ship postcard, free to use, no copyright restrictions image.

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Public domain image of an industrial building, factory, structure, works, 19th-20th century industrial revolution, free to use, no copyright restrictions - Picryl description

The Delaware and Hudson Canal from Lock, looking north.

The Delaware and Hudson Canal from Lock, looking north.

New York stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylvania.

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylva...

Pennsylvania stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More

Entering Poe Lock, Sault Ste. Marie, Mich.

Entering Poe Lock, Sault Ste. Marie, Mich.

Public domain photo of vintage Michigan postcard, 19th century, free to use, no copyright restrictions image - Picryl description.

Entering and Leaving Poe Lock, Sault Ste. Marie, Mich.

Entering and Leaving Poe Lock, Sault Ste. Marie, Mich.

Picryl description: Public domain photo of vintage Michigan postcard, free to use, no copyright restrictions image.

Lock of the Lateral Canal at Columbus Ohio.

Lock of the Lateral Canal at Columbus Ohio.

Public domain scan of the book page, free to use, no copyright restrictions image - Picryl description

The Delaware and Hudson Canal from Lock, looking north.

The Delaware and Hudson Canal from Lock, looking north.

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Entering Poe Lock, Sault Ste. Marie, Mich.

Entering Poe Lock, Sault Ste. Marie, Mich.

Picryl description: Public domain photo of vintage naval ship postcard, free to use, no copyright restrictions image.

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine, Fla.

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine...

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

State Dam and Lock, Saranac River, Adirondack Mts., N. Y.

State Dam and Lock, Saranac River, Adirondack Mts., N. Y.

Picryl description: Public domain image of a historic building in Detroit, Michigan, free to use, no copyright restrictions.

Old Traders Lock, Sault Ste. Marie, Ont.

Old Traders Lock, Sault Ste. Marie, Ont.

Picryl description: Public domain image of a historic building in Detroit, Michigan, free to use, no copyright restrictions.

At High Level, Poe Lock, Sault Ste. Marie, Mich.

At High Level, Poe Lock, Sault Ste. Marie, Mich.

Picryl description: Public domain photo of vintage naval ship postcard, free to use, no copyright restrictions image.

Martin's Lock - Balcony Bluff on the James River.

Martin's Lock - Balcony Bluff on the James River.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Martin's Lock - Balcony Bluff on the James River.

Martin's Lock - Balcony Bluff on the James River.

Virginia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

The Delaware and Hudson Canal from Lock, looking north.

The Delaware and Hudson Canal from Lock, looking north.

New York stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

The Delaware and Hudson Canal, looking south-west from Lock No. 21.

The Delaware and Hudson Canal, looking south-west from Lock No. 21.

Picryl description: Public domain image of a park, pond, water reflection, romantic landscape, 18th-19th century, free to use, no copyright restrictions.

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine, Fla.

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine...

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylvania.

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylva...

Pennsylvania stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Picryl description: Public domain image from Robert Dennis collection of stereoscopic prints, free to use, no copyright restrictions.

Close as this lock of hair the ribband binds, ... [signed Eliza Cooke, Liverpool, June 15, 1795; and again with a new verse, March 1, 1796]

Close as this lock of hair the ribband binds, ... [signed Eliza Cooke,...

Public domain scan of the book page, free to use, no copyright restrictions image - Picryl description

Martin's Lock - Balcony Bluff on the James River.

Martin's Lock - Balcony Bluff on the James River.

Virginia stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

The Delaware and Hudson Canal from Lock, looking north.

The Delaware and Hudson Canal from Lock, looking north.

Public domain image of an arch structure, bridge, historic place ruins, classical architecture, free to use, no copyright restrictions - Picryl description

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Picryl description: Public domain image of the back of stereograph card, stereoscopic view, free to use, no copyright restrictions

Martin's Lock - Balcony Bluff on the James River.

Martin's Lock - Balcony Bluff on the James River.

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Nashua Lock Company. New Hampshire in 19th century. Stereoscope card.

Public domain image of an industrial building, factory, structure, works, 19th-20th century industrial revolution, free to use, no copyright restrictions - Picryl description

The Delaware and Hudson Canal, looking south-west from Lock No. 21.

The Delaware and Hudson Canal, looking south-west from Lock No. 21.

New York stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who ass... More

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine, Fla.

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine...

Public domain scan of the back of stereograph card, stereoscopic view, 19th century, free to use, no copyright restrictions - Picryl description

Government Lock, High Bridge, Ky.

Government Lock, High Bridge, Ky.

Picryl description: Public domain image of a historic building in Detroit, Michigan, free to use, no copyright restrictions.

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine, Fla.

The Lock on the dungeon door of the Old Spanish Fort, at St. Augustine...

Florida stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who asse... More

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Weigh Lock, Junction Oswego and Erie Canal, Syracuse, N.Y.

Picryl description: Public domain image of the back of stereograph card, stereoscopic view, free to use, no copyright restrictions

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylvania.

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylva...

Pennsylvania stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylvania.

Lock on Schuylkill Canal. 19th century stereoscopic views of Pennsylva...

Pennsylvania stereoscopic card. Robert Dennis's stereographs collection includes more than 72,000 stereoscopic views organized primarily by geography. The collection bears the name of the native New Yorker who... More