Maybe Olaf Jansen wasn't the first to make it into the hollow portion?
" The ' NORWOOD REVIEW OF ENGLAND ', May 12, 1884 issue, summarizes the
surprising discovery of a warm country in the north by Arctic explorers. If
warm land exists there, then conceivably lost civilizations might as well.
Quoting from the article, ' We do not admit that there is ice up to the
pole - once inside THE GREAT ICE BARRIER, a new world breaks upon the
explorer, the climate is mild like that of England, and afterward, balmy as
the Greek Isles.'"
Dean