Most of the house is made up of old growth redwood and Douglas fir, materials of choice in California in 1892. The redwood in particular has a natural advantage in that the termites hate it. All the original redwood windows have very little rot around them. Other than scraping off the old lifting paint, they were remarkably intact. Here’s a photo of our painter replacing the glass in one of the bathroom windows.
The other advantage of the old growth Redwood is the sheer length of the spans possible back then. Here is a photo of joists just below the turret on the roof in front of the house. The joists run almost 30′ long as one solid piece.