His father was a Presbyterian minister and a school principal; his mother came from a distinguished literary and academic figures.

In 1896, Stevenson published The Square of Sevens, and the Parallelogram: An Authoritative Method of Cartomancy with a Prefatory Note by Robert Antrobus that was supposedly written in 1735.

In 1906, under the pseudonym Xavier Mayne, Stevenson published the homosexually themed novel Imre: A Memorandum, and in 1908 a sexology study, The Intersexes,[1] a defense of homosexuality from a scientific, legal, historical, and personal perspective.

[citation needed] "Between a protozoan and the most perfect development of the mammalia, we trace a succession of dependent intersteps...A trilobite is at one end of Nature's workshop: a Spinoza, a Shakespeare, a Beethoven is at the other... gone on insisting that each specimen of sex in humanity must... follow out two programmes only, or else be thought amiss, imperfect, and degenerate [?]

Why have we set up masculinity and femininity as processes that have not perfectly logical and respectable inter-steps?