Unlike those simple treasure hides, a large-scale historic site like this naturally requires a whole professional team to properly excavate. So once Leonard Ethan obtained the evidence, he began to contact the team.
Finding a team would not be easy for an ordinary person because there is a limited number of high-level archaeological teams in each country, and they are definitely not something that can be easily summoned and dismissed.
Moreover, this land belongs to a rare noble territory, so the items excavated from it do not have to be handed over to the British government according to the laws of the 20th century. That is why getting an excavation team from the government is even more difficult. However, this is not a problem at all for Leonard Ethan.
After all, many members of the Golden Dawn specialize in exploring supernatural phenomena, so he easily found people willing to help.