Surely the time was gone forever when the broad river could bring up unwelcome ships; Russia was only the place where the linseed came from,—the more the better,—making grist for the great vertical millstones with their scythe-like arms, roaring and grinding and carefully sweeping as if an informing soul were in them.
There are no more uses of "vertical" in the book.
Show samples from other sources
The architect used long vertical lines to pull the eye upward.
On a small ladder, a good-looking sandy-haired boy is painting a vertical sign that will say: "Doc’s."
Arthur Laurents and Stephen Sondheim -- Westside Story