There was a rumor among some officers that Fawcett used a Ouija board, a popular tool of mediums, to help make tactical decisions on the battlefield. “He and his intelligence officer . . . would retire to a darkened room and put their four hands, but not their elbows, on the board,” Henry Harold Hemming, who was then a captain in Fawcett’s corps, wrote in an unpublished memoir. “Fawcett would then ask the Ouija Board in a loud voice if this was a confirmed location [of the enemy’s position], and if the miserable board skidded over in the right direction; not merely would he include it in his list of confirmed locations, but often order 20 rounds of 9.2 howitzer to be fired at the place.”

from The Lost City of Z by David Grann