De Wohl returned to London and then came up with his proposal to examine the astrological advice being given to Hitler by Swiss stargazer Karl Ernst Krafft.

BBC: NEWS | UK | British 'studied' Hitler's stars

De Wohl claimed that as Hitler relied heavily on Krafft's predictions, which were based on mathematics surrounding birthdates, the British could gain a unique insight into his thinking if they knew the astrological advice he was receiving.

BBC: NEWS | UK | British 'studied' Hitler's stars