Dave

19A: ...north of the equator.

46A/47D was a Natick for an Aussie. Both require a depth of US-knowledge that can only be built up by doing these crosswords, which is what I enjoy. Two new facts learned today!

I had FsD/sTL at 4A/5D guessing that Fulton County may have had something to do with St Louis. Full Self Driving... will pass.