Found this interesting, average attendances from late 50's, maybe 1956/7 season, or 1957/8....forgot which it was now. Seems odd to see Liverpool in division 2. Edit. May have been 55/56.
That had crossed my mind, but there may have been only 2 got relegated at the time. See @Best uncapped Keeper's post above, we played Liverpool in second division in 1958. So we possibly stayed up (56/7) and Liverpool promoted. Then both relegated in 57/58.