E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Pillar to Post.
Running from pillar to post—from one thing to another without any definite purpose. This is an allusion to the manege. The pillar is the centre of the riding ground, and the posts are the columns at equal
distances, placed two and two round the circumference of the ring.
