Prince Charles and Princess Diana officially announced their separation in December 1992, but rumors about their troubled marriage swirled much earlier. That winter, the couple traveled on an official tour to India, and longtime royal photographer Arthur Edwards shared that Diana tried to pull the wool over his eyes until he captured one photo.

In his new autobiography Cup of Tea, Arthur? My Extraordinary 50 Years Photographing the Royal Family , Edwards wrote that he confronted Princess Diana about the number of solo engagements she’d been taking instead of making appearances with Charles.

“I became so concerned about the amount of time she and Charles were spending apart that, at a cocktail party in Madrid, I asked her to explain,” he wrote in an excerpt shared in the Sun.…