Eli shut the door behind them, not wanting any strays to come in. Even if the others did look preoccupied, it was always best to be cautious and who knew what his son was up to with that damn house elf. "And this time you'll get more booze and cake after," he said with a small smirk.
He took a moment to pull out his penseive along with three vials - two of which had glowing memories in them. "We'll actually be building on what we tried last time with memories, except this time I've procured a dead man's memory - specifically one of my father's, as I believe that the nightmares are not actually nightmares, but rather the memories belonging to a dead person." It wasn't giving away the whole game, far from it really as he would now be allowed to test two separate theories.
Eli had isolated one of his father's memories earlier, a benign one of his jubilation of the news he would be a grandfather. He didn't quite understand why that one would be preserved, but Eli didn't question it - right not it would serve as something he could part with. "And I am in need of a test subject outside of myself to observe the effects."