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Survey for ship canal to connect the Lakes Erie and Ontario Lockport route surveyed under the direction of Capt. W.G. Williams U.S. Top. Engs. by Lieuts. T.F. Drayton and J.G. Reed NYPL. Survey for ship canal to connect the Lakes Erie and Ontario Lockport route surveyed under the direction of Capt Williams Top Engs by Lieuts Drayton