The London Mercury was a monthly magazine published by Field Press Ltd. It was published first in 1919, one year after the end of the First World War. It sought to fill a gap in the market of literary magazines. According to its founding editor it was unique among other literary journals as it combined the publication of creative writing, reviews of the contemporary literary output, publishing poetry, prose writing and full-length literary essays, and critical surveys of books. Its mission was to foster the teaching of English and the appreciation of the arts.
Especially after Rolfe Arnold Scott-James took over as editor in 1934, the magazine increasingly featured short stories and poetry by Indian writers. It also included survey articles and reviews by Indian writers on topics such as Indian art and Indian literature. Reviews of books on India were also increasingly published by the journal. The journal absorbed The Bookman in 1934. In the late 1930s, the magazine ran into financial difficulties. The last issue was published in April 1939, after which the journal was absorbed into Life and Letters Today.