He used the Theosophical Society's vast international connections to publish, translate and disseminate his work across Europe and America.

The case was dismissed for lack of evidence, but it led to Leo's belief that astrology needed to be revised to be legitimised.

We need not argue the point as to its reality, but instead make a much-needed change in the word and call Astrology the science of tendencies.

[5]: 105  He died a few weeks later from an apoplexy (cerebral haemorrhage), at 10:00 am on 30 August 1917, whilst on a holiday at Bude in Cornwall, which was intended to restore his health after the ordeals of the trial.

[5]: 74  He had used the 'holiday' as a period in which he rewrote hundreds of pages of astrological text to "recast the whole system and make it run more along the lines of character reading and less as the assertion of an inevitable destiny", despite being warned by his wife that "he needed rest badly after the worry and anxiety of the law case", and was overworking himself and heading for a breakdown.