Staining a 130 year old pine floor
There is a good possibility that the pine boards in a 130 year old house are very dense wood. Old growth timber from that time was quite different from what we experience as "pine" today. As such that type of wood is much less absorbent than even some types of hardwood that you may choose today. The dense wood leaves more of the stain material on the surface as opposed to penetrating and thus longer to dry.

As case in point I used Minwax stain on some oak shelves I built recently. I wanted to use the shelves with just the stained surface without applying a shiny sealer like polyurethane. It took a good 10 days before the stain was completely dry. And that was in west coast spring weather. Such stain in 90° and 80% humidity could very well take longer to fully dry.