An interesting point picked up from a colleague in forensics. In 1914 -16 when the army was recruiting the average height of recruits was around 5,6 . this compares with 5.8 in 1960. a significant proportion of recruits were under weight.
A conclusion is that in edwardian times people were smaller generally than now, in my view the Preiser figures may not be too small, more that modern figures are too big.