Dayton Ward wrote:
One of his other Trek contributions was occasional voice work. He performed the readings for Sarek and Federation, as well as the "historical documentary" vids included with the CD-ROM Star Trek Omnipedia. He may have done some other stuff, too, but those are what I recall offhand.
His reading of Federation makes it one of my favorite audiobooks.
During the last years of his life he did a lot of voice work, not only Trek, but commercials and documentary narration, along with teaching acting classes in NYC.