It seems that every reference I can find refers to the columns of a four-poster bed as 'posts', so why is it called a four-poster bed?
I've found some references that indicate that it was called a four-post bed in the 14th and 15th centuries, but nothing describing the change over time or where it came from.
A friend posited:
I assume it came from the way people talk. “That’s a four poster there”
But I would just like some more information regarding that. Is it just a change in the way people talk? Or maybe how they write?