In Hallencourt, Marguerite fell in love with Alic Beaufve, from Wellington, who enlisted in February 1915 and served in Egypt before reaching the Western Front with the Otago Mounted Rifles in 1916.
Lieutenant Beaufve and Marguerite Lefebvre were married in Paris in May 1917, when Marguerite was 20. The photos in the garden were taken around that time as Marguerite is wearing a wedding band.
The couple - who moved back to Paris after the war when Lieutenant Beaufve was discharged - had a daughter, Aliette. But in 1928, 11 years after their marriage, Lieutenant Beaufve leapt to his death from the top of the Arc de Triomphe.
Mr Beaufve's mother Ida was a colourful character married to Robert Beaufve, the French consul-general in New Zealand in the early 1900s.
Lieutenant Beaufve was mentioned in dispatches for his "devotion to duty" as a divisional claims officer in France. His "tact and judgment" which fostered friendly ties between the Kiwis and the Allies - presumably owing to his Franco-New Zealand background - were of "direct and material benefit to the service".
His grandson Alic Merlivat posed for a picture outside the house in the very spot where his grandparents had been photographed.
The house is now owned by the Hallencourt mayor, Pierre Martin, who dug out other documents linking the village to New Zealand. New Zealander Private Frank Hughes was shot for desertion during World War I. He is buried in the local cemetery. In 2006, a delegation came from Wellington with an official pardon.