'an historic' vs. 'a historic'

This entry was published at least two years ago (originally posted on March 26, 2003). Since that time the information may have become outdated or my beliefs may have changed (in general, assume a more open and liberal current viewpoint). A fuller disclaimer is available.

Ever been unsure about the distinction between ‘an historic’ and ‘a historic’? The question came up in a thread here recently and I did some investigating.