It was here that she would have met Edward Woore, Karl Parsons, and Arnold Robinson[1] She was accepted in 1914 as a probationer at the Royal Academy Schools but when war broke out that year she chose to put her painting studies on hold and enrolled in the Voluntary Aid Detachment (V.A.D.)

After the war she became an assistant and then manager of Edward Woore's studio at St Peter's Square in Hammersmith.

[1] In 1931 she married artist Miles de Montmorency (1893–1963) who would often assist her with her stained glass work.

One of Montmorency's earliest commissions was for a two-light war memorial window in the South Chapel of St Botolph's Church in Cambridge, Cambridgeshire.

[3] Montmorency completed an East window above the High Altar in St Saviour's Church in Guernsey, Channel Islands.

[nb 2] The window is of three-lights and depicts Christ in Majesty with scenes from the Annunciation, Nativity, Crucifixion and the Road to Emmaus.

In 1946 Rachel de Montmorency was commissioned to design a single light window for the North Chancel of the 12th century St Mary's church of Great Shefford, Berkshire, which depicts the Blessed Virgin Mary and Baby Jesus.

The Anglican Parish Church of The Holy Trinity in Street, Somerset, dating from the 14th century, has been designated by English Heritage as a Grade I listed building.

[6] St Mary Magdalene in Wandsworth, Inner London[7] has two three-light windows completed in 1954 for the North Aisle West by Rachel de Montmorency, who was assisted by her husband.

One window depicts a lamb, St John the Baptist and a Pelican and the other, Mary Magdalene, the Madonna and Child and Simeon.

St John's Church, a Grade II listed building, is situated in Walham Green, Fulham, London.

The church, built in 1828, is a mixture of styles with a Georgian Chancel and pointed Gothic revival arches and windows.

[5] The present church of St Michael and All Angels of Jarvis Brook, Sussex was built in 1905 on a site given by Lord Abergavenny and designed by John Beaumont Tansley.

This window was installed in memory of Captain Charles Bunburby R.N, who was a sidesman and a member of the Parochial Church Council for many years.

[5] Rachel de Montmorency completed a two-light window in 1960 depicting a Madonna & Child and a ship.

[9][10] Situated in Ocklynge, Eastbourne, Sussex, St Michael and All Angels Church was opened in 1901 and the Nave and Tower were finished in 1911.