Lumber ? ? ?

[parishht]

CTT, I live in an old brick farmhouse built in 1820.
I have the same broblem with all my walls and stairs.
The best you can do is to shore up the main beams in the basement.
Jack them slowly to get them were you want them.
only go about 1/2 to 3/4 inch at a time.
I have a center chimney which the main beam is into
and the joists are on top of the sill.
dryrot over the years has eaten away at the ends and the floors are like ocean waves.
I am leveling everything in steps so as not to do any major damage.