Recherche dans la collection - Welland Canal from actual survey. Section first, from Lake Ontario to the Village of Thorold, &c..By order of the Board of Directors. Surveyed by F. P. Rubidge, D.P.S. under the direction of N. H. Baird, H. H. Killaly, Civil Engineers. [Second title:] Welland Canal. Section second, from Thorold to the Aqueduct. [Third title:] Welland Canal. Section third, from below the Aqueduct to its conflux with Lake Erie. [cartographic material]