None of these techniques work in my house from 1850. Best I can do is measure stud distances in the attic and work my way from the nearest window.

Mine is from 1850, interior walls are 18" on center, studs the wide way. Exterior are 14" o.c., everything is rough cut chestnut real 2x4, and sheds nails unless you drive dead straight; I think it's half petrified. Balloon frame.

Stud finder is useless, it's all plaster and lath, I'm still replacing knob and tube, slightly complicated by needing to work around the defunct pipes from the gas lighting the knob and tube replaced. I tore out some 1.5" drains that had an actual inside diameter of less than 1/2" due to decades of buildup.

And yet it still feels more solid than any modern house I've been in, the insurance company says replacement cost is 480k (sale price was 109k). 18" thick stone foundation.