[1] On 25 August 1949, he discovered 48P/Johnson, a periodic comet expected to pass no closer than 1.2 to 1.3 AU from our planet in 2025.
[4] He matriculated at Grey College, Bloemfontein, South Africa and started working on a mine but when his brother, Cecil Robert Johnson, was killed in a mining accident he applied for a position at the Union Observatory in Johannesburg, South Africa.
He recovered and went to England where he served as a bomber pilot for the Royal Flying Corps.
In January 1935 he discovered a faint comet, that was visible for less than two months, while searching the sky in declination 52 degrees south.
From 1921 to 1953, his observations of the asteroids and more than 30 comets were published in the Circular of the Union Observatory, Johannesburg.