Yeah, I realized the the antennae error soon after the book went to print and there was nothing to do about it. It's the kind of thing you hope a copy editor will catch. King Kong fans everywhere will notice. There are three or four errors like that that I've found since the book went to print. All minor, thankfully. I'm sure you guys will find more. Whenever you're writing a period piece, you do your best to get the details right, then hope your editors will catch what you miss, then keep your fingers crossed. All in all, I hope I got the period details right.