They've made progress!
They've progressed from the first floor to the spare bedroom on the third/top floor of the townhouse.
At some point overnight (or early morning; I tend to get up at the crack of 9:00) both Tanya and Tomba made their way up two flights of stairs, past assorted agog observers, to new hiding places. I'd seen both cats making independent slinking forays around the first floor last night when I spent some hours in the living room, quietly reading and watching TV, occasionally talking and chirping to them, so I'm assuming that they independently explored upward till there was nowhere else to go.
Tanya is currently ensconced in a cat castle next to one of the twin beds. Tomba is under one of the beds.
Tanya let me put my hand inside the cat castle to pet her. Yes, yes, I realize that putting your hand through a small opening into an enclosed space in which a scared (or at least worried) cat is hiding is just asking for it to come back shredded, but I'd observed how Tanya reacted to stranger touching while similarly tucked away at the shelter. She was fine then, and just now she actually enjoyed it enough to position her head for maximum chin-skritching. Did I even hear a hint of a purr? Tomba is less sure he wants anything to do with me and I'm not going to push him.
Just went upstairs to check. Tanya's now under the bed where Tomba had been and Tomba's under the other bed.
Schooner continues to be mightily curious about the newcomers, willing to get within inches before retreating. The others have an air of "What the hell is going on here?" to varying degrees but no one's outright distraught, everyone's eating, and it's been remarkably quiet overall. I'm really surprised, in fact, at how little craziness there's been. I guess my guys are accustomed by now to strangers showing up in their territory. It helps that T&T aren't the least bit aggressive.
Checked again. Now they're together under one bed. And so I leave them, and you, Dear Readers, for now.