Whatever cause the sound of the footsteps down the hall, I could rule out that it was caused by
- someone walking down the hall, I could see there was no one there and I searched the house, the residents were in their beds and the doors to outside locked.
- creaky floorboards, there were none
- wind, it was a still night
- plumbing, there was no tap or anything on that would cause water to flow
- heating, it was not on (coal fired with a water pump I had to switch on to feed the radiators)
- subsidence, there were no issues with the house
- vermin under the house, no access to anything more than a mouse and a mouse could not make a noise that loud from under the house that could be heard in the house.
- the only object in the hall was a bookcase and the books did not move/fall over. They couldn't, it was so full.
I, or another adult could replicate the sound, by walking down the hall. I was in the house for 4 years and heard it only once. I spent a lot of time trying to figure out what caused the noise and found no source.