Ron wrote:
I can't find the circuit breakers for any of the upstair bedrooms in
this old, 1908 built house. Would it be reasonably safe to replace a
light switch wearing rubber gloves and rubber-soled shoes if it comes
down to having nno other options?

Ron
Hi,
It all depends on your expertise and experience. If I were you, by all
means I'd track down the right breaker.