F. A. Mitchell-Hedges

While Frederick expressed interest in exploring at a young age, John was against the idea of his son travelling, making their relationship a difficult one.

The two mostly lived apart from each other and whilst they had no children of their own they adopted Canadian orphan Anne Marie Le Guillon, today known as Anna Mitchell-Hedges.

[5] After marrying Lillian, Mitchell-Hedges took a trip to Canada where he met and eventually adopted Anne Marie Le Guillon.

[5] While on his many excursions, Mitchell-Hedges repeatedly made claims of having "discovered" Indian tribes and "lost cities" that had already been documented years, sometimes centuries, before.

He claimed to have found it with his daughter Anna at the Maya ruin of Lubaantun while on an expedition to British Honduras (present-day Belize) in the 1920s.

However, neither George Lucas nor Steven Spielberg—co-creators of the successful concept and franchise—have indicated that any specific individual inspired their character, other than the generic stock heroes popularised in the matinée series and pulp magazines of the 1930s and 1940s.