Maybe Wolford would be better served by submitting those skulls to DNA analysis rather than doing "anthropological phrenology". And the "number of living humans" sampled by geneticists is already large enough to be a statistically valid sample. Many examples of all races have been "fingerprinted", with NO data to support Wolford's position.
Mungo Man, an anatomically modern skeleton, was discovered in 1974 in the dry bed of Lake Mungo in New South Wales, Australia. The skeleton made the news again recently when scientists dated his remains to 60,000 years ago. Mungo Man became the oldest human fossil that was physically similar to modern humans. But further analysis of Mungo’s mitochondrial DNA (mtDNA) could not link him to any human population living today.