Successful thus far, at least it appears to be coming alive nicely. After keeping the mason jar covered with a piece of muslin held on with a rubber band, in the bedroom above the living room (where our woodstove is), and where the temperature tends to keep a steady 70 degrees, there are bubbles forming and it has risen maybe 1/3 of its original height.
Today I am going to feed it a bit more than might be required to keep it going as I want to get a nearly full jar before I use half to make my first loaf of sour dough bread. I am adding 1/3 cup unbleached organic white flour and 1/3 cup warm water. And then stir it with the handle of the wooden spoon and leave in our kitchen counter now which can get cool, but I think it will be fine.
Warm wishes, Tonya