No footing with my 1950 poured concrete house?
A lot of the houses built back then weren't built that great from a foundation standpoint. This was right after WW-II and they guys were coming back from the war and there was a housing boom. Builders were putting up things quick and a few assumptions were made that we have subsequently found to not be correct. Often, they figured that they could just throw a slab of concrete on a piece of land it it would stay in one piece and last. When I was in New Orleans back before Katrina, I noticed houses that had been built with this sort of careless regard to their foundations. They figured that they could dig some ditches (they called them canals), let the water drain into the ditches, then pump the water out of the ditches, and then pour concrete slaps directly on top of the new 'dry' land. Eventually, the ground subsides and the slab breaks, so then there is a market for pumping sand back under the slabs to make them level. I've seen houses that had 18" of difference between the level of the concrete in the garage vs the concrete in the driveway. I've seen houses where the ridge line of the roof had a definite angle in the center of it with at last a food difference in elevation at the middle than at the ends -- basically, it looked like the house had been broken in half along its spine. These days, they drive very long piles / pylons / piers down into the sediment to act as support before putting the concrete on top of this.