[2] In February 1916 he married for the final time, again in London, to divorcee Norah Kathleen Finberg (née Mutch).

[2] Gallichan made his name as a journalist, being one of the earliest members of the staff of the Daily Mail,[2] and was later a pioneer in sex education in Britain.

[2] Gallichan's earliest works were released under the pseudonym Geoffrey Mortimer, including a number of novels and some essays on sex and morality.

[2][3] His works covered a very wide variety of subjects, from outdoor pursuits and ornithology to eugenics and criticism of the women's movement.

[2] His work on outdoor pursuits were particularly concerned with his personal interests in angling and bird-watching in Britain and abroad.