My house was built circa 1850, it has a full basement with a fieldstone foundation. Some of the stones in it are twice the size of the ones in that picture. The largest is about six feet long*. Every time I'm down there I wonder how they got them there. I do know that the floor of the basement is at the original grade level, they built the wall and then filled around it to put the house up on a hill.
(*Around here we call a stone of that size "medium-sized." A "large" stone is one that is visible from space.)