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    Photograph taken at the P. L. Robertson Manufacturing Co. Limited.

    The office building is on Bronte Street in Milton, Ontario. Peter Lymburner Robertson, 1879-1951. Inventor, industrialist. Inventor of the Robertson Recess Screw. For more information, see "P. L. Inv

    The picture shows the intersection of the railway line and Bronte Road.

    Isa and Jessie Robertson were the sisters of P.L. Robertson. For further information see "P.L. Inventor of the Robertson Screw" by Ken Lamb.

    John and Annie Robertson were the parents of the inventor P. L. Robertson. John died in 1886 and Annie in 1909. John was an immigrant from Scotland and Annie was born in Canada, the daughter of Scott

    For further information regarding P. L. Robertson, please consult "P.L., Inventor of the Robertson Screw" by Ken Lamb and "Milton Area Biographies, Vol. II" by Alex Cooke.

    Left to right - John Brown Robertson, William Robertson (oldest of the boys), Annie (Brown) Robertson with P.L. in her arms, Hatton Robertson, Isabella (Isa), Janet (Jessie), John Robertson, father o

    For further information regarding P.L. Robertson, please consult "P.L., inventor of the Robertson Screw" by Ken Lamb and "Milton Area Biographies, Vol. II", by Alex Cooke.

    For further information regarding the P. L. Robertson Co., please consult "P. L., inventor of the Robertson Screw." by Ken Lamb.

    Good condition. For further information regarding P.L. Robertson, please consult "P.L. Robertson, inventor of the Robertson Screw", by Ken Lamb, and "Milton Area Biographies, V.2."