re: #523 ObserverArt

Or anything that sounds like a vowel…which is why H is covered most times.

The Chicago Manual of Style covers the letter H (I got into a mixup with my senior editor over that):

Unless the letter H is silent at the beginning of a word, the article “a” applies (a historic event, not an historic event). The sound the word “historic” begins with is not a vowel sound.