For twenty-five years Galpin was identified with the Somerville Journal, serving as compositor, proof reader, cashier, editor woman's page and assistant manager.

[2] At Somerville, on August 25, 1873, at the age of sixteen, she married Henry Wallace Galpin (1819–1875),[4] [2] a well-to-do gentleman, many years her senior.

When the proprietor became the treasurer of Middlesex County, Galpin assumed the management of the business details, while retaining oversight of the circulation schemes and all literary and special features of the paper.

[6] The "Woman's Page", which she conducted, and which was one of the leading features of the paper, was on as high a level as the work in any of the popular literary weeklies, and would of itself give her distinction in journalism.

Her most important addresses in point of honor were before the Suburban Press Association of New England and the Woman's Congress at the World's Columbian Exposition in 1893.

At the completion of twenty-five years in journalism in one office and under one management, in the fall of 1903, the citizens of Somerville gave Galpin a reception and dinner at the Vendome in Boston, as a testimonial of their appreciation of her efforts in all lines of work in the city.

She won distinction as a writer and as a speaker, in society and in philanthropy, though her energies were largely devoted to the literary and office direction of a prosperous weekly journal.