I recently bought a home that is at least 100 years old.  It sits on a rock wall foundation that has a bulge in an area that is about 10 feet long.  I have corrected the grade on the exterior to allow water to run away from the house and I suspect that this was a major contributor to the area that is bulging.  Also a bulkhead was added near this area in the last 10 to 20 years.  I belive that the disruption of the original wall also contributed to the current problem.   I’m wondering if anyone has a good idea on how to re-enforce the inside of the foundation so that the wall does not continue to bulge and eventually fail.  Thanks for your input.