After numerous attempts, I've finally found a way to intercept and contain the ambient energy of the leylines in a kind of non-Aristotelian battery I've dubbed the "Power Core". I admit it was difficult capturing an energy I can barely measure, much less interact with. Luckily, it seems that the porous stone of the Foundation's caverns possesses such conductive qualities. Using stone flakes and copper wire, my Power Cores collect significant power. My early prototypes collected too much, in fact, but I've since reinforced the container.

We don't yet know the repercussions of tapping into this power field. As a precaution, these devices should not be taken outside of the House. Ideally, the Bureau should no longer need to rely on typical energy sources. It's my greatest feat of engineering yet.

I've always had an interest in invention. I like the creativity that it allowed, set within the firm boundaries of logic and physics. Father never approved, calling it a "mundane" science. With that in mind, I dedicate this invention to Theodore Ash Senior. My he scowl in peace!