Answer: What In The World Happened Here? XLIV: (44)

Originally Posted By: Harvey Lankford
Hole-in-the-Wall is a remote hideout located in the Big Horn Mountains of Johnson County in northern Wyoming.

This was the site of the Barnes mystery.

"Webster subsequently disposed of most of the body in the Thames, where it was discovered close to Barnes Bridge. Some of the remains ended up as a free meal to local kids, according to the Daily Mail, but what happened to the head remained a mystery.

Now, 132 years later, police have finally identified the unfortunate victim's skull. ADI Bolton reviewed original case files and census records, and deployed radiocarbon testing to provide "compelling evidence that the skull was indeed that of Mrs Thomas".

Wiki is here.

There is some confusion as to which Attenborough lived there. Richard directed Ghandi & Jurassic Park.

In any case the missing skull was found in a hole in the wall at the Hole In The Wall Pub.

Verum audaces non gerunt indusia alba. - Ipsi dixit MCMLXXII