A well-preserved boot found by a group of climbers on Mount Everest could be a clue to solving one of the most enduring adventure mysteries in the history of exploration of the world’s highest peak.

The climbers who made the discovery in late September have reason to believe that it could contain some of the remains of Andrew Comyn Irvine, 22, whose ascent with an expert climber in an attempt to be the first to reach the summit in 1924 led to their disappearance.

The recent explorers, from a National Geographic film crew, were on a glacier below the north face of Everest when they spotted a brown leather boot sticking out of the ice.

Looking closer, they noticed a sock with a patch sewed to it that spelled “A.C. Irvine” in stitched red letters.

“We just kind of walked around, like for a few minutes, being like, ‘Are you kidding me?’” Jimmy Chin, a mountaineer and filmmaker, said of the find. “We just stumbled upon one of the great discoveries of our time.”

In April 1942, Mr. Irvine, a talented engineer but inexperienced climber from Birkenhead, England, who was better known as Sandy, joined George Mallory, a British mountaineer renowned for having reached 27,000 feet above sea level on Mount Everest in 1922.