Tenuous positions. That was an interesting turn to phase and he supposed he had those as well, with his father and his father-in-law, although he had done a noble job of re-establishing himself. Normally he would have gone ahead with no second thought because he needed to know, however, with Adrian here and that extra variable being presented, he hesitated.
Even if this was his lab and the case was relevant to his research given what he knew about what he did, perhaps it was best to at least bring in one of his assistant and no have the auror mucking about. "Well, if that is the case, then I am going to have to establish my own wards and kindly escort you back out of the department."
He set about to setting runes to make a sort of containment field for the thing. Eli could make it more specific later, but right now he didn't care if the thing could move a little. Although there was still the chance that Adrian's spells could hold. "If you will," he said motioning to the door once he was through.