[1] She was engaged in education from her teens, first in family or school, then in the wider field of the temperance movement, particularly in continental Europe.

At the age of 20, she went to Prussia, and after two years' training in a German family, returned to England with poor health.

In 1874, she went to Bruges, Belgium, but after three months, removed to Antwerp, In that city, at the end of 1876, Gray's sister joined her and they opened a small English-language school.

For several years, she and her sister conducted two Bands of Hope and Juvenile Temples in Antwerp, the members being American, English, Flemish, and German children.

[1] In 1883, in Antwerp, Gray served as secretary at the formation of the Coffee Tavern Company, a temperance refreshment house.

Gray was personally active in the Congresses held in Zürich (1887), Paris (1889), Christiania (1891), The Hague (1893), Basel (1895), Brussels (1897), and Vienna (1901).

[1] About 1887, on the request of Frances Willard, Gray served as missionary organizer for the World's Woman's Christian Temperance Union (W.C.T.U.)

[4] At the quarterly session of the Warwickshire District Lodge of Good Templars, held in Nuneaton, in December 1912, a resolution of condolence was presented and carried by a standing ovation.