micky wrote

I found a big spider, 2 full inches long with bent furry legs, 4mm
wide, splayed evenly at roughly 45^ angles. All dark grey.

How can there be only one of them? I had never seen
another spider anything remotely like it in the house and
it's been 2 weeks and I haven't seen another one yet.

Because he got kicked out of his home by
the other spiders and ended up in your place.

(This one had an accident and he's dead.
A UPS fell on him.)

I have report you to the SPCFTGR, you'll be soorree...