Caedmon was purchased in the 1980s by Harper & Row, who then destroyed the label and took most of the catalog out of print. The company was begun by a lesbian couple, and I used to place my Drama Book Shop orders with them over the phone. They used great performers, and a few of my favorite Caedmon recordings were:
Gentlemen Prefer Blondes: Carol Channing reads the novel, accompanied by a 1920s dance band
Eudora Welty Reads "Why I Live at the P.O."
Mother Goose with Celeste Holm, Boris Karloff, Cyril Ritchard and music by Hershey Kay
Tartuffe translated by Richard Wilbur, performed by the Stratford Festival
Marat/Sade performed by the Royal Shakespeare Company
A Streetcar Named Desire starring Rosemary Harris and James Farentino