For 47 years, he’s been known as the Pinnacle Man.

On a brutally cold winter’s day on Jan. 16, 1977, two hikers found a man’s frozen body in a cave below the Pinnacle, a scenic viewpoint off the Appalachian Trail in Albany Township in eastern Pennsylvania, about 75 miles northwest of Philadelphia.

The authorities performed an autopsy, took the victim’s fingerprints and determined that he was a male between 25 and 35 years old, with blue eyes and reddish curly long hair.

There were no signs of foul play, and the authorities determined the death was suicide from a drug overdose.

When no one came forward to claim him, the Pinnacle Man was buried in a potter’s field.

At some point, the original fingerprints taken during the autopsy went missing, and the copies of those prints were too poor in quality to use for identification, the authorities said.

More than four decades later, the man now has a name: Nicholas Paul Grubb, who was 27 and from Fort Washington, Pa.

At a news conference last week, officials with the Berks County Coroner’s Office explained that a Pennsylvania state trooper tracked down the missing fingerprints to help identify Mr. Grubb.