Parks Canada print of Trent Hydraulic Lock No. 1 Peterborough. Longitudinal section through well, scale 1/6" to 1ft. Reproduced by litho from original linen blueprint as signed by R.B. Rogers. Trent Severn Waterway Interpretive Program. Includes description on side of the Peterborough Liftlock.
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- Isolated manuscripts are small collections - often single items, maps, drawings, individual letters or very small groupings of letters and documents.