Vector Distance between Corpora: 3D representation

Phonemes

The Elizabethan corpus is set at the point (1,0,0): on the x-axis.
The Romantics corpus is above the Elizabethan corpus (with only a x-axis and y-axis coordinate).
The Victorian corpus is to the left: the only corpus with a z-axis component.
All vectors are normalized (with a length of 1 unit).