Archaeological excavation work is not as simple as pulling carrots. Apart from the exceptional case of Leonard, under normal circumstances, locating a relic site requires a great deal of time and effort, from the initial collection of information to the subsequent excavation work.
More importantly, even with thorough preparations, the actual fieldwork situation might differ from what everyone had expected, and it is not uncommon to have spent a long time working, only to find nothing in the end.
According to Chairman Charles' information, the Rose Cross Society has stumbled upon a pitfall this time. They tried to find the early gathering place of the Germanic people in the Black Forest but discovered an ancient Roman camp site after digging for half a day.