ya.. this old house has me full time job fix'n stuff
hey, it held up great. no micro cracks or anything. and my kitchen was MUCH warmer this past winter, and the mice were .. dunno .. outside i guess. i did not parge it yet as i wanted to see if the mortar held up on its own before i cover it.
when i excavate my basement i'll take a more serious look at it.. well, a structural engineer will - not me.
i did not research any interior solutions as in my case there was just a crawl space on the other side (i.e. "the cat hole") that nobody wants to go into .. believe me.
"if you can't be handsome, at least you can be handy" -Redgreen
There is a company in Ohio, called Airplaco that makes a "Handy Grout" manual mortar/ grout pump that fits into a bucket and pumps material by a hand pump , like an old well pump handle, It has a 6ft hose and @ 200 psi. Problem is cost, @ $1,000. I looked to rent one in central Indiana, no one has it. I may have to go to Indianapolis to find. I too have a stone foundation and due to a recent infestation of rats/mice, several "holes" and "cracks" need to be filled. Good Luck, Ray