If someone had found such an item, there would be nothing else for him to find. But there was a possibility that the spatial ring that Henricus Longus had left in this place was still around, so Minos wanted to at least check it out.
If it were, he would collect it and use it wisely, adding it to the resources he had already used from Henricus Longus' main inheritance.
He knew that man wouldn't mind this. In fact, that was his goal in leaving these memories to Minos. If others had not discovered his inheritances, it would be his heir's responsibility to collect and use them to the best of his ability.
If he found something, this would be, on the one hand, good, for he would have valuable resources for himself. But on the other hand, it would be bad since it would indicate that the members of the Longus family had probably disappeared from this world over the years, and he would have no help in his mission.