Wiktionary
wooden mare
n. (context idiomatic obsolete English) a http://en.wikipedia.org/wiki/Wooden%20horse, a torture device
Usage examples of "wooden mare".
The little wooden mare, of course, looked quite gay and natural, but it was obvious that Fred's sense of dignity was suffering as much as the Lion's, and the Unicorn wore the affronted expression of a duchess being forced to dance a jig.