[It does explain quite a bit, and also helps as Pepper flips through the racks. Though she's not at all an expert on historical fashion, there's general guidelines she can keep in mind while she searches, along with paying attention to what Vastra selects for herself.]

I did get that impression somehow. [Pepper grins a bit as she agrees that it's clear Vastra is something over than average.]

Well, as I said, it's a self-sustaining energy source. The technology was originally developed by Tony's father Howard, but Tony's taken it far beyond the original design. Before we were brought here, we had completed construction on a high-rise that can be run for at least a year without any cost to the city thanks to the arc reactor.