[3] Her twin sister Marie Long-Landry (1877–1968) was a doctor of medicine and was the first woman to head a clinic.

[2] During World War I (1914–18) Marguerite Pichon-Landry was in charge of the information office for dispersed families.

Cecile Brunschvicg and Marguerite Pichon Landry, leading members of the CNFF and UFSF, brought the women's objections to the education commission to the attention of government ministers.

[7] Pichon-Landry and Henry Hébrard de Villeneuve of the Council of State surveyed the postwar hiring practices of administration.

Pichon-Landry reported in March 1920 to a joint meeting of the legislative and women's sections of the Musée.

[5] Pichon-Ladry made the point that the "sedentary" and "regular nature of administrative work allowed women to combine a job with familial duties."

[8] Through the connections of her brother, the government minister Adolphe Landry, she had privileged access to the political elite.

In February 1936 Pichon-Landry and Brunschvicg, representing the CNFF and UFSF respectively, addressed premier Albert Sarraut and met Jean Zay, his under-secretary.

[12] On 3 July 1936 the Council of State ruled that women had the "legal capacity" to compete for administrative positions, despite not having the vote, but the government could decide "whether the interests of a service necessitate, within a ministry, restrictions on the admission and advancement of female personnel."