Louisa Gertrude was married as "Gertrude L".

Walter was living with grandparents in 1891 at North Warnborough, Hampshire:
George White Head Mar 48 General Dealer Hants Odiham
Mary Ann White Wife Mar 42 Hants Odiham
Emily White Daur UnM 19 Assist Grocers Shop Hants Odiham
William White Son 14 Assist Grocers Shop Hants Odiham
Arthur Wite Son 12 Scholar Hants Odiham
Walter White Grandson 1 Hants Odiham
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In 1901, we can see Walter living at North Warnborough, Hampshire with his grandparents:
George White Head Mar 58 Grover/Coal Merchant Hants Odiham
Mary Ann White Wife Mar 52 Hants Crookham
Emily White Daur UnM 30 Hants Odiham
Arthur J White Son UnM 22 Grocers Son Hants Odiham
Georgina M White Daur UnM 15 Hants Odiham
Walter J White G.Son 11 Hants Odiham
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In 1911, we see Walter living at North Warnborough, Odiham, Hampshire with his grandmother:
Mary Ann White Head 62 Widow Grocer Hants Crookham
Emily White Daughter 40 Single Assisting in the Business Hants Odiham
Walter James White Grandson 21 Single Carman in Coal Business Hants Odiham
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Walter married Louisa in 1915.
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I believe Walter was killed in the Battle of Arras, France.
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In Memory of
Private W J WHITE

31960, 2nd Bn., Wiltshire Regiment
who died
on 09 April 1917

Remembered with honour
NEUVILLE-VITASSE ROAD CEMETERY
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Our gratitude goes to the members and volunteers at Find A Grave web site for recording the details, in memory of Walter.

Louisa was always referred to by her second Christian name, Gertrude - my mother always called her Aunty Gerty.
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She lived at Chapel Cottage, North Warnborough, Hampshire until she was forced to move into residential accommodation due to the land where her house stood being redeveloped.