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    L-R Gordon Mackenzie, Karl Ansingh, Richard Alway, Ontario Heritage Foundation

    Installation of the P. L. Robertson heritage plaque. L-R - Don Knight, MPP, Len McNeil, President, Gordon MacKenzie, Mayor Gordon Krantz.

    L-R Gordon MacKenzie, Richard Alway, Ontario Heritage Foundation

    L-R Richard Alway, Ontario Heritage Foundation, Gordon MacKenzie, Len McNeil.

    P. L. Robertson outside the plant in Milton

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription: "To Stimulate The memory of

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription: "To Stimulate The memory of

    Three employees of P. L. Robertson Manufacturing Co. Ltd., at their annual picnic. Left to right - Bernice Rusk, June Cooper, Doreen Walton

    Queenie Merrett, stenographer at the P. L. Robertson Company in the 1920s

    Doreen Walton was a stenographer at the P. L. Robertson Company, Milton.

    Sheeny Shepherd and Gordon Mackenzie worked at the P. L. Robertson Manufacturing Company, Milton

    P. L. Robertson (right) and his brother and P. L.'s house in Milton, Ontario

    For further information, see "P. L., inventor of the Robertson screw" by Ken Lamb.

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. The photographs are pasted into an album with the following inscription "To Stimulate The

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription "To Stimulate The memory of M

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription "To Stimulate The memory of M

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription: "To Stimulate The memory of

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription: "To Stimulate The memory of

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription: "To Stimulate The memory of

    This series of photographs was taken during P. L. Robertson's trip to Scotland in August and September 1918. They are pasted into an album with the following inscription: "To Stimulate The memory of