In the early 20th century, Starr wrote for The Occult Review, an illustrated monthly journal containing articles and correspondence by many notable occultists of the day, including Aleister Crowley, Arthur Edward Waite, W. L. Wilmshurst, Franz Hartmann, Florence Farr, and Herbert Stanley Redgrove.

In 1931 Starr established a retreat center at East Challacombe, North Devon (a couple of miles from Combe Martin), where he invited Meher Baba to come and meet westerners.

[1] In December 1932, Starr grew irritated with Meher Baba and wrote to him, "Give me either the 400 pounds you owe me or illumination; otherwise, I will leave you and expose you as a fraud!"

[3] He was married firstly on 1 March 1917 at Paddington Register Office to Lady Mary Grey, daughter of the 8th Earl and Countess of Stamford, by whom he had two sons.

He was divorced by decree nisi 10 April 1930, on his admission of an adulterous relationship of four years' duration with Margaret Ross of East Challacombe, Combe Martin, Devon.